diff --git a/DEPS b/DEPS
index 0648412fa98..ad927f8d71c 100644
--- a/DEPS
+++ b/DEPS
@@ -156,7 +156,7 @@ vars = {
   "intl_rev": "5d65e3808ce40e6282e40881492607df4e35669f",
   "json_rpc_2_rev": "0521afb58b9aeb90beda8fa5b00b98b998ec9ba6",
   "leak_tracker_rev": "098bafcf99a5220e3c352d895d991e163568ee03", # b/299640139
-  "lints_rev": "b044acab9f6669b3d8e781923a8ff86877801177",
+  "lints_rev": "90d350eb89fe265c13b5a9c34bfd41e5323896ed",
   "logging_rev": "642ed2124f7ef7abc819a0e22ae0c7afdb5398d3",
   "markdown_rev": "ae766d52d22b54c05240989871b14ede1848b345",
   "matcher_rev": "11daad9d3b62539feca5decfa465ccdfb87dde86",
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_base.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_base.dart
index 401363dad29..cd9219ba092 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_base.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_base.dart
@@ -4,6 +4,8 @@
 
 /// Support for client code that needs to interact with the requests, responses
 /// and notifications that are part of the analysis server's wire protocol.
+library;
+
 import 'dart:convert' hide JsonDecoder;
 
 import 'package:analysis_server_client/src/protocol/protocol_generated.dart';
diff --git a/pkg/analyzer_cli/tool/perf.dart b/pkg/analyzer_cli/tool/perf.dart
index 09aa60a5544..75845883054 100644
--- a/pkg/analyzer_cli/tool/perf.dart
+++ b/pkg/analyzer_cli/tool/perf.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// An entrypoint used to run portions of analyzer and measure its performance.
+library;
+
 import 'dart:io' show exit;
 
 import 'package:analyzer/dart/analysis/features.dart';
diff --git a/pkg/analyzer_cli/tool/perf_test.dart b/pkg/analyzer_cli/tool/perf_test.dart
index 48c857ae221..ebe28b1d5af 100644
--- a/pkg/analyzer_cli/tool/perf_test.dart
+++ b/pkg/analyzer_cli/tool/perf_test.dart
@@ -4,6 +4,8 @@
 
 /// The only purpose of this file is to enable analyzer tests on `perf.dart`,
 /// the code here just has a dummy import to the rest of the code.
+library;
+
 import 'perf.dart' as m;
 
 void main() => print('done ${m.scanTotalChars}');
diff --git a/pkg/analyzer_plugin/test/integration/support/integration_test_methods.dart b/pkg/analyzer_plugin/test/integration/support/integration_test_methods.dart
index 25fbdb3ec98..b0bbcf9566b 100644
--- a/pkg/analyzer_plugin/test/integration/support/integration_test_methods.dart
+++ b/pkg/analyzer_plugin/test/integration/support/integration_test_methods.dart
@@ -7,6 +7,8 @@
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /// Convenience methods for running integration tests.
+library;
+
 import 'dart:async';
 
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
diff --git a/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart b/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
index 8cab210b597..611cfb94cda 100644
--- a/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
+++ b/pkg/analyzer_plugin/test/integration/support/protocol_matchers.dart
@@ -7,6 +7,8 @@
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /// Matchers for data types defined in the analysis server API.
+library;
+
 import 'package:test/test.dart';
 
 import 'integration_tests.dart';
diff --git a/pkg/analyzer_plugin/tool/spec/api.dart b/pkg/analyzer_plugin/tool/spec/api.dart
index fe1231eac4e..b692a602a4f 100644
--- a/pkg/analyzer_plugin/tool/spec/api.dart
+++ b/pkg/analyzer_plugin/tool/spec/api.dart
@@ -4,6 +4,8 @@
 
 /// Data structures representing an API definition, and visitor base classes
 /// for visiting those data structures.
+library;
+
 import 'dart:collection';
 
 import 'package:analyzer_utilities/html_dom.dart' as dom;
diff --git a/pkg/analyzer_plugin/tool/spec/codegen_inttest_methods.dart b/pkg/analyzer_plugin/tool/spec/codegen_inttest_methods.dart
index 0a44cfcb187..c2c4fd73826 100644
--- a/pkg/analyzer_plugin/tool/spec/codegen_inttest_methods.dart
+++ b/pkg/analyzer_plugin/tool/spec/codegen_inttest_methods.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Code generation for the file "integration_test_methods.dart".
+library;
+
 import 'package:analyzer_utilities/tools.dart';
 import 'package:path/path.dart' as path;
 
@@ -85,6 +87,8 @@ class CodegenInttestMethodsVisitor extends DartCodegenVisitor
     outputHeader(year: '2017');
     writeln();
     writeln('/// Convenience methods for running integration tests.');
+    writeln('library;');
+    writeln();
     writeln("import 'dart:async';");
     writeln();
     for (var uri in api.types.importUris) {
diff --git a/pkg/analyzer_plugin/tool/spec/codegen_matchers.dart b/pkg/analyzer_plugin/tool/spec/codegen_matchers.dart
index aaf4ef7f209..ece3338f20e 100644
--- a/pkg/analyzer_plugin/tool/spec/codegen_matchers.dart
+++ b/pkg/analyzer_plugin/tool/spec/codegen_matchers.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Code generation for the file "matchers.dart".
+library;
+
 import 'package:analyzer_utilities/tools.dart';
 
 import 'api.dart';
@@ -90,6 +92,8 @@ class CodegenMatchersVisitor extends HierarchicalApiVisitor with CodeGenerator {
     outputHeader(year: '2017');
     writeln();
     writeln('/// Matchers for data types defined in the analysis server API.');
+    writeln('library;');
+    writeln();
     writeln("import 'package:test/test.dart';");
     writeln();
     writeln("import 'integration_tests.dart';");
diff --git a/pkg/analyzer_plugin/tool/spec/from_html.dart b/pkg/analyzer_plugin/tool/spec/from_html.dart
index 6e9bb32dd31..c7675b52815 100644
--- a/pkg/analyzer_plugin/tool/spec/from_html.dart
+++ b/pkg/analyzer_plugin/tool/spec/from_html.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Code for reading an HTML API description.
+library;
+
 import 'dart:io';
 
 import 'package:analyzer_utilities/html_dom.dart' as dom;
diff --git a/pkg/analyzer_plugin/tool/spec/implied_types.dart b/pkg/analyzer_plugin/tool/spec/implied_types.dart
index f8412eca841..03d4ffad29d 100644
--- a/pkg/analyzer_plugin/tool/spec/implied_types.dart
+++ b/pkg/analyzer_plugin/tool/spec/implied_types.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Code for enumerating the set of types implied by the API.
+library;
+
 import 'package:analyzer_utilities/tools.dart';
 
 import 'api.dart';
diff --git a/pkg/analyzer_plugin/tool/spec/to_html.dart b/pkg/analyzer_plugin/tool/spec/to_html.dart
index 89ab494c90c..7f165515789 100644
--- a/pkg/analyzer_plugin/tool/spec/to_html.dart
+++ b/pkg/analyzer_plugin/tool/spec/to_html.dart
@@ -5,6 +5,8 @@
 /// Code for displaying the API as HTML. This is used both for generating a
 /// full description of the API as a web page, and for generating doc comments
 /// in generated code.
+library;
+
 import 'dart:convert';
 
 import 'package:analyzer_utilities/html_dom.dart' as dom;
diff --git a/pkg/async_helper/lib/async_minitest.dart b/pkg/async_helper/lib/async_minitest.dart
index 2f4ab9316d9..88bc9476b86 100644
--- a/pkg/async_helper/lib/async_minitest.dart
+++ b/pkg/async_helper/lib/async_minitest.dart
@@ -27,6 +27,8 @@
 ///
 /// Eventually, it would be good to refactor those tests to use the expect
 /// package directly and remove this.
+library;
+
 import 'dart:async';
 
 import 'package:async_helper/async_helper.dart';
diff --git a/pkg/async_helper/pubspec.yaml b/pkg/async_helper/pubspec.yaml
index daaf7a85abf..f2b92e73938 100644
--- a/pkg/async_helper/pubspec.yaml
+++ b/pkg/async_helper/pubspec.yaml
@@ -9,7 +9,7 @@ description: >-
  provided in package:test.
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/dart2js_info/bin/src/to_proto.dart b/pkg/dart2js_info/bin/src/to_proto.dart
index 163725f3f65..0eb0724cdcd 100644
--- a/pkg/dart2js_info/bin/src/to_proto.dart
+++ b/pkg/dart2js_info/bin/src/to_proto.dart
@@ -4,6 +4,7 @@
 
 /// Command-line tool to convert an info.json file outputted by dart2js to the
 /// alternative protobuf format.
+library;
 
 import 'dart:io';
 
diff --git a/pkg/dart2js_info/lib/binary_serialization.dart b/pkg/dart2js_info/lib/binary_serialization.dart
index dbf81265928..8f682d1b66e 100644
--- a/pkg/dart2js_info/lib/binary_serialization.dart
+++ b/pkg/dart2js_info/lib/binary_serialization.dart
@@ -5,6 +5,7 @@
 /// Info serialization to a binary form.
 ///
 /// Unlike the JSON codec, this serialization is designed to be streamed.
+library;
 
 import 'dart:convert';
 
diff --git a/pkg/dart2js_info/lib/json_info_codec.dart b/pkg/dart2js_info/lib/json_info_codec.dart
index 32372300faf..19f4b2d820a 100644
--- a/pkg/dart2js_info/lib/json_info_codec.dart
+++ b/pkg/dart2js_info/lib/json_info_codec.dart
@@ -5,6 +5,8 @@
 // ignore_for_file: avoid_dynamic_calls
 
 /// Converters and codecs for converting between JSON and [Info] classes.
+library;
+
 import 'dart:collection';
 import 'dart:convert';
 
diff --git a/pkg/dart2js_info/lib/proto_info_codec.dart b/pkg/dart2js_info/lib/proto_info_codec.dart
index 7e1a54dff0e..3b9f3ea9f5d 100644
--- a/pkg/dart2js_info/lib/proto_info_codec.dart
+++ b/pkg/dart2js_info/lib/proto_info_codec.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Converters and codecs for converting between Protobuf and [Info] classes.
+library;
+
 import 'dart:convert';
 
 import 'package:fixnum/fixnum.dart';
diff --git a/pkg/dart2js_info/lib/src/proto/info.pb.dart b/pkg/dart2js_info/lib/src/proto/info.pb.dart
index 6d56230bb9b..a67095f1508 100644
--- a/pkg/dart2js_info/lib/src/proto/info.pb.dart
+++ b/pkg/dart2js_info/lib/src/proto/info.pb.dart
@@ -1,4 +1,3 @@
-///
 //  Generated code. Do not modify.
 //  source: info.proto
 //
diff --git a/pkg/dart2js_info/lib/src/proto/info.pbenum.dart b/pkg/dart2js_info/lib/src/proto/info.pbenum.dart
index 505c9b9e149..e6a462e151e 100644
--- a/pkg/dart2js_info/lib/src/proto/info.pbenum.dart
+++ b/pkg/dart2js_info/lib/src/proto/info.pbenum.dart
@@ -1,4 +1,3 @@
-///
 //  Generated code. Do not modify.
 //  source: info.proto
 //
diff --git a/pkg/dart2js_info/lib/src/proto/info.pbjson.dart b/pkg/dart2js_info/lib/src/proto/info.pbjson.dart
index e14b5d8bdf1..cd4a4bc9c69 100644
--- a/pkg/dart2js_info/lib/src/proto/info.pbjson.dart
+++ b/pkg/dart2js_info/lib/src/proto/info.pbjson.dart
@@ -1,4 +1,3 @@
-///
 //  Generated code. Do not modify.
 //  source: info.proto
 //
diff --git a/pkg/dart2js_info/lib/src/proto/info.pbserver.dart b/pkg/dart2js_info/lib/src/proto/info.pbserver.dart
index ad952e9ff0b..bf15d7d947f 100644
--- a/pkg/dart2js_info/lib/src/proto/info.pbserver.dart
+++ b/pkg/dart2js_info/lib/src/proto/info.pbserver.dart
@@ -1,4 +1,3 @@
-///
 //  Generated code. Do not modify.
 //  source: info.proto
 //
diff --git a/pkg/dart2js_info/pubspec.yaml b/pkg/dart2js_info/pubspec.yaml
index 4a7d9f56335..c86518816cf 100644
--- a/pkg/dart2js_info/pubspec.yaml
+++ b/pkg/dart2js_info/pubspec.yaml
@@ -6,7 +6,7 @@ description: >-
   --dump-info.
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/dart2js_tools/lib/src/dart2js_mapping.dart b/pkg/dart2js_tools/lib/src/dart2js_mapping.dart
index d3c9d62e639..231ec58cd77 100644
--- a/pkg/dart2js_tools/lib/src/dart2js_mapping.dart
+++ b/pkg/dart2js_tools/lib/src/dart2js_mapping.dart
@@ -4,6 +4,7 @@
 
 /// Representation of a source-map file with dart2js-specific extensions, and
 /// helper functions to parse them.
+library;
 
 import 'dart:convert';
 import 'dart:io';
diff --git a/pkg/dart2js_tools/lib/src/name_decoder.dart b/pkg/dart2js_tools/lib/src/name_decoder.dart
index 8b323ac16d7..463fdbd8047 100644
--- a/pkg/dart2js_tools/lib/src/name_decoder.dart
+++ b/pkg/dart2js_tools/lib/src/name_decoder.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Logic to deobfuscate minified names that appear in error messages.
+library;
 
 import 'package:source_maps/source_maps.dart';
 
diff --git a/pkg/dart2js_tools/lib/src/sourcemap_helper.dart b/pkg/dart2js_tools/lib/src/sourcemap_helper.dart
index 0cd4e6cf54e..17939cdf80b 100644
--- a/pkg/dart2js_tools/lib/src/sourcemap_helper.dart
+++ b/pkg/dart2js_tools/lib/src/sourcemap_helper.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Utility functions to make it easier to work with source-map files.
+library;
 
 import 'package:source_maps/source_maps.dart';
 // ignore: implementation_imports
diff --git a/pkg/dart2js_tools/lib/src/trace.dart b/pkg/dart2js_tools/lib/src/trace.dart
index c371fd75a53..862fee2aa94 100644
--- a/pkg/dart2js_tools/lib/src/trace.dart
+++ b/pkg/dart2js_tools/lib/src/trace.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Representation of stack traces and logic to parse d8 stack traces.
+library;
+
 // TODO(sigmund): we should delete this implementation and instead:
 // - switch to use the stack_trace package
 // - add support non-d8 frames
diff --git a/pkg/dart2js_tools/lib/src/trace_decoder.dart b/pkg/dart2js_tools/lib/src/trace_decoder.dart
index 11907df143c..a34289f9f56 100644
--- a/pkg/dart2js_tools/lib/src/trace_decoder.dart
+++ b/pkg/dart2js_tools/lib/src/trace_decoder.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Logic to expand and deobfuscate stack traces.
+library;
 
 // ignore: implementation_imports
 import 'package:source_maps/src/utils.dart';
diff --git a/pkg/dart2js_tools/pubspec.yaml b/pkg/dart2js_tools/pubspec.yaml
index ce67a9bd7aa..12c16da1ce9 100644
--- a/pkg/dart2js_tools/pubspec.yaml
+++ b/pkg/dart2js_tools/pubspec.yaml
@@ -6,7 +6,7 @@ description: >
   information, deobfuscation of stack-traces and minified names.
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/dartdev/tool/sdk_size.dart b/pkg/dartdev/tool/sdk_size.dart
index bfb0d2a34e5..bf711a7efdb 100644
--- a/pkg/dartdev/tool/sdk_size.dart
+++ b/pkg/dartdev/tool/sdk_size.dart
@@ -4,6 +4,7 @@
 
 /// Generate a json file representing the files in the Dart SDK and their sizes.
 /// Print out instructions for opening Dart DevTools to visualize this info.
+library;
 
 import 'dart:convert';
 import 'dart:io';
diff --git a/pkg/dev_compiler/bin/dartdevc.dart b/pkg/dev_compiler/bin/dartdevc.dart
index 7ca53761df1..ad440242979 100644
--- a/pkg/dev_compiler/bin/dartdevc.dart
+++ b/pkg/dev_compiler/bin/dartdevc.dart
@@ -5,6 +5,7 @@
 
 /// Command line entry point for Dart Development Compiler (dartdevc), used to
 /// compile a collection of dart libraries into a single JS module
+library;
 
 import 'dart:isolate';
 
diff --git a/pkg/dev_compiler/lib/ddc.dart b/pkg/dev_compiler/lib/ddc.dart
index c0e9d0f35dc..f084b998190 100755
--- a/pkg/dev_compiler/lib/ddc.dart
+++ b/pkg/dev_compiler/lib/ddc.dart
@@ -5,6 +5,7 @@
 /// Command line entry point for Dart Development Compiler (known as ddc,
 /// dartdevc, dev compiler), used to compile a collection of dart libraries into
 /// a single JS module.
+library;
 
 import 'dart:async';
 import 'dart:convert';
diff --git a/pkg/dev_compiler/test/modular_suite.dart b/pkg/dev_compiler/test/modular_suite.dart
index 4e1f4caa7f8..aeae86f841e 100644
--- a/pkg/dev_compiler/test/modular_suite.dart
+++ b/pkg/dev_compiler/test/modular_suite.dart
@@ -5,6 +5,8 @@
 /// Test the modular compilation pipeline of ddc.
 ///
 /// This is a shell that runs multiple tests, one per folder under `data/`.
+library;
+
 import 'package:modular_test/src/io_pipeline.dart';
 import 'package:modular_test/src/runner.dart';
 
diff --git a/pkg/dev_compiler/test/modular_suite_canary_unsound.dart b/pkg/dev_compiler/test/modular_suite_canary_unsound.dart
index 298c3be557c..4aeff091480 100644
--- a/pkg/dev_compiler/test/modular_suite_canary_unsound.dart
+++ b/pkg/dev_compiler/test/modular_suite_canary_unsound.dart
@@ -6,6 +6,8 @@
 /// sound null safety.
 ///
 /// This is a shell that runs multiple tests, one per folder under `data/`.
+library;
+
 import 'package:modular_test/src/io_pipeline.dart';
 import 'package:modular_test/src/runner.dart';
 
diff --git a/pkg/dev_compiler/test/modular_suite_unsound.dart b/pkg/dev_compiler/test/modular_suite_unsound.dart
index a650349119e..fc5d0b32f85 100644
--- a/pkg/dev_compiler/test/modular_suite_unsound.dart
+++ b/pkg/dev_compiler/test/modular_suite_unsound.dart
@@ -5,6 +5,8 @@
 /// Test the modular compilation pipeline of ddc without sound null safety.
 ///
 /// This is a shell that runs multiple tests, one per folder under `data/`.
+library;
+
 import 'package:modular_test/src/io_pipeline.dart';
 import 'package:modular_test/src/runner.dart';
 
diff --git a/pkg/dev_compiler/tool/compile_dartdevc_sdk.dart b/pkg/dev_compiler/tool/compile_dartdevc_sdk.dart
index e55e97e4551..e9fe6e29272 100644
--- a/pkg/dev_compiler/tool/compile_dartdevc_sdk.dart
+++ b/pkg/dev_compiler/tool/compile_dartdevc_sdk.dart
@@ -5,6 +5,7 @@
 
 /// Tool that consumes the .dill file of an entire dart-sdk and produces the
 /// corresponding JavaScript module.
+library;
 
 import 'dart:io';
 import 'package:dev_compiler/src/kernel/command.dart';
diff --git a/pkg/expect/lib/minitest.dart b/pkg/expect/lib/minitest.dart
index f4dd0ed693a..c83375a104f 100644
--- a/pkg/expect/lib/minitest.dart
+++ b/pkg/expect/lib/minitest.dart
@@ -21,6 +21,8 @@
 ///
 /// Eventually, it would be good to refactor those tests to use the expect
 /// package directly and remove this.
+library;
+
 import 'dart:async';
 
 import 'package:expect/expect.dart';
diff --git a/pkg/expect/pubspec.yaml b/pkg/expect/pubspec.yaml
index ac8a5240cae..524c0a62c5b 100644
--- a/pkg/expect/pubspec.yaml
+++ b/pkg/expect/pubspec.yaml
@@ -9,7 +9,7 @@ description: >-
  test assertions.
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/frontend_server/lib/compute_kernel.dart b/pkg/frontend_server/lib/compute_kernel.dart
index a77542e172c..8a77911145e 100644
--- a/pkg/frontend_server/lib/compute_kernel.dart
+++ b/pkg/frontend_server/lib/compute_kernel.dart
@@ -7,6 +7,8 @@
 /// A library to invoke the CFE to compute kernel summary files.
 ///
 /// Used by `utils/bazel/kernel_worker.dart`.
+library;
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/pkg/frontend_server/pubspec.yaml b/pkg/frontend_server/pubspec.yaml
index 6d17580d66f..ad9c59059c6 100644
--- a/pkg/frontend_server/pubspec.yaml
+++ b/pkg/frontend_server/pubspec.yaml
@@ -4,7 +4,7 @@ description: A resident kernel compiler
 publish_to: none
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/js_runtime/lib/synced/async_status_codes.dart b/pkg/js_runtime/lib/synced/async_status_codes.dart
index a1190ff39c2..a3d9ceec34e 100644
--- a/pkg/js_runtime/lib/synced/async_status_codes.dart
+++ b/pkg/js_runtime/lib/synced/async_status_codes.dart
@@ -6,6 +6,7 @@
 
 /// Codes that transformed sync*/async/async* functions use to communicate with
 /// js_helper functions.
+library;
 
 const int SUCCESS = 0;
 const int ERROR = 1;
diff --git a/pkg/js_runtime/pubspec.yaml b/pkg/js_runtime/pubspec.yaml
index fe9036aa0f3..5ea7a56a85f 100644
--- a/pkg/js_runtime/pubspec.yaml
+++ b/pkg/js_runtime/pubspec.yaml
@@ -3,7 +3,7 @@ name: js_runtime
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dev_dependencies:
diff --git a/pkg/js_runtime/test/in_sync_test.dart b/pkg/js_runtime/test/in_sync_test.dart
index be8828da4fa..eb2a8a7e987 100644
--- a/pkg/js_runtime/test/in_sync_test.dart
+++ b/pkg/js_runtime/test/in_sync_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Test to verify that this package is in-sync with dart2js runtime libraries.
+library;
+
 import 'dart:io';
 
 import 'package:_fe_analyzer_shared/src/util/relativize.dart';
diff --git a/pkg/js_shared/pubspec.yaml b/pkg/js_shared/pubspec.yaml
index 88860765c91..51f89bc6fdd 100644
--- a/pkg/js_shared/pubspec.yaml
+++ b/pkg/js_shared/pubspec.yaml
@@ -3,7 +3,7 @@ name: js_shared
 publish_to: none
 
 environment:
-  sdk: '>=2.14.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dev_dependencies:
diff --git a/pkg/js_shared/test/in_sync_test.dart b/pkg/js_shared/test/in_sync_test.dart
index e10c4d6b665..f1940da88f8 100644
--- a/pkg/js_shared/test/in_sync_test.dart
+++ b/pkg/js_shared/test/in_sync_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Test to verify that this package is in-sync with shared runtime libraries.
+library;
+
 import 'dart:io';
 
 import 'package:_fe_analyzer_shared/src/util/relativize.dart';
diff --git a/pkg/modular_test/lib/src/generic_runner.dart b/pkg/modular_test/lib/src/generic_runner.dart
index e797d9dce99..bf1279e1f65 100644
--- a/pkg/modular_test/lib/src/generic_runner.dart
+++ b/pkg/modular_test/lib/src/generic_runner.dart
@@ -7,6 +7,8 @@
 ///
 /// This library contains no logic related to the modular_test framework. It is
 /// used to help integrate tests with our test infrastructure.
+library;
+
 // TODO(sigmund): this library should move somewhere else.
 
 import 'dart:async';
diff --git a/pkg/modular_test/lib/src/io_pipeline.dart b/pkg/modular_test/lib/src/io_pipeline.dart
index 059272219c5..9de675e2f43 100644
--- a/pkg/modular_test/lib/src/io_pipeline.dart
+++ b/pkg/modular_test/lib/src/io_pipeline.dart
@@ -5,6 +5,8 @@
 /// An implementation of [Pipeline] that runs using IO.
 ///
 /// To define a step, implement [IOModularStep].
+library;
+
 import 'dart:io';
 
 import 'pipeline.dart';
diff --git a/pkg/modular_test/lib/src/loader.dart b/pkg/modular_test/lib/src/loader.dart
index 7621df4afaf..f27eb0b0e02 100644
--- a/pkg/modular_test/lib/src/loader.dart
+++ b/pkg/modular_test/lib/src/loader.dart
@@ -12,6 +12,8 @@
 ///   * subfolders: each considered a module with multiple files
 ///   * a modules.yaml file: a specification of dependencies between modules.
 ///     The format is described in `test_specification_parser.dart`.
+library;
+
 import 'dart:io';
 import 'suite.dart';
 import 'test_specification_parser.dart';
diff --git a/pkg/modular_test/lib/src/memory_pipeline.dart b/pkg/modular_test/lib/src/memory_pipeline.dart
index a8c87ac0d22..5c6fd6cf2c1 100644
--- a/pkg/modular_test/lib/src/memory_pipeline.dart
+++ b/pkg/modular_test/lib/src/memory_pipeline.dart
@@ -5,6 +5,8 @@
 /// An implementation of [Pipeline] that runs in-memory.
 ///
 /// To define a step, implement [MemoryModularStep].
+library;
+
 import 'pipeline.dart';
 import 'suite.dart';
 
diff --git a/pkg/modular_test/lib/src/pipeline.dart b/pkg/modular_test/lib/src/pipeline.dart
index 1b9d1bef5e8..1c2ddf97335 100644
--- a/pkg/modular_test/lib/src/pipeline.dart
+++ b/pkg/modular_test/lib/src/pipeline.dart
@@ -13,6 +13,8 @@
 /// The IO-based implementation ensures hermeticity by copying data to different
 /// directories. The memory-based implementation ensures hemeticity by filtering
 /// out the data before invoking the next step.
+library;
+
 import 'suite.dart';
 
 /// Describes a step in a modular compilation pipeline.
diff --git a/pkg/modular_test/lib/src/runner.dart b/pkg/modular_test/lib/src/runner.dart
index ef33748a683..5d7003d683b 100644
--- a/pkg/modular_test/lib/src/runner.dart
+++ b/pkg/modular_test/lib/src/runner.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// A runner that executes a pipeline on a folder containing modular tests.
+library;
+
 import 'dart:io';
 
 import 'package:args/args.dart';
diff --git a/pkg/modular_test/lib/src/suite.dart b/pkg/modular_test/lib/src/suite.dart
index 21ae6311efc..709ae7ae27e 100644
--- a/pkg/modular_test/lib/src/suite.dart
+++ b/pkg/modular_test/lib/src/suite.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Model for a modular test.
+library;
 
 /// A modular test declares the structure of the test code: what files are
 /// grouped as a module and how modules depend on one another.
diff --git a/pkg/modular_test/lib/src/test_specification_parser.dart b/pkg/modular_test/lib/src/test_specification_parser.dart
index 2026ac7265b..dcd09c4517c 100644
--- a/pkg/modular_test/lib/src/test_specification_parser.dart
+++ b/pkg/modular_test/lib/src/test_specification_parser.dart
@@ -50,6 +50,8 @@
 /// The framework is agnostic of what the flags are, but at this time we only
 /// use the name of experimental language features. These are then used to
 /// decide what options to pass to the tools that compile and run the tests.
+library;
+
 import 'package:yaml/yaml.dart';
 
 /// Parses [contents] containing a module dependencies specification written in
diff --git a/pkg/modular_test/pubspec.yaml b/pkg/modular_test/pubspec.yaml
index 8292fc7e5be..4e85fb4847c 100644
--- a/pkg/modular_test/pubspec.yaml
+++ b/pkg/modular_test/pubspec.yaml
@@ -7,7 +7,7 @@ description: >
  pipeline of different SDK tools.
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/modular_test/test/io_pipeline_test.dart b/pkg/modular_test/test/io_pipeline_test.dart
index 951cc0eda76..aa4e818f06e 100644
--- a/pkg/modular_test/test/io_pipeline_test.dart
+++ b/pkg/modular_test/test/io_pipeline_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Unit test for in-memory pipelines.
+library;
+
 import 'dart:io';
 
 import 'package:modular_test/src/io_pipeline.dart';
diff --git a/pkg/modular_test/test/loader/loader_test.dart b/pkg/modular_test/test/loader/loader_test.dart
index 8e253900654..cf7de5c7b7e 100644
--- a/pkg/modular_test/test/loader/loader_test.dart
+++ b/pkg/modular_test/test/loader/loader_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Tests that the logic to load, parse, and validate modular tests.
+library;
+
 import 'dart:io';
 
 import 'package:test/test.dart';
diff --git a/pkg/modular_test/test/memory_pipeline_test.dart b/pkg/modular_test/test/memory_pipeline_test.dart
index 40c1c7e39d7..98c1d006101 100644
--- a/pkg/modular_test/test/memory_pipeline_test.dart
+++ b/pkg/modular_test/test/memory_pipeline_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Unit test for in-memory pipelines.
+library;
+
 import 'dart:async';
 
 import 'package:modular_test/src/memory_pipeline.dart';
diff --git a/pkg/modular_test/test/pipeline_common.dart b/pkg/modular_test/test/pipeline_common.dart
index 8d392ac0621..7cef7e3eff5 100644
--- a/pkg/modular_test/test/pipeline_common.dart
+++ b/pkg/modular_test/test/pipeline_common.dart
@@ -10,6 +10,8 @@
 ///
 /// We place most of the logic here to guarantee that the two different pipeline
 /// implementations are consistent with each other.
+library;
+
 import 'dart:async';
 
 import 'package:test/test.dart';
diff --git a/pkg/modular_test/test/validate_pipeline_test.dart b/pkg/modular_test/test/validate_pipeline_test.dart
index 90711a6234a..1e5135b76ed 100644
--- a/pkg/modular_test/test/validate_pipeline_test.dart
+++ b/pkg/modular_test/test/validate_pipeline_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Unit test for validation of modular steps in a pipeline.
+library;
+
 import 'package:test/test.dart';
 import 'package:modular_test/src/suite.dart';
 import 'package:modular_test/src/pipeline.dart';
diff --git a/pkg/modular_test/test/validate_suite_test.dart b/pkg/modular_test/test/validate_suite_test.dart
index 509344493ad..742a9ef4f3b 100644
--- a/pkg/modular_test/test/validate_suite_test.dart
+++ b/pkg/modular_test/test/validate_suite_test.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Unit test for validation of modular steps in a pipeline.
+library;
+
 import 'package:test/test.dart';
 import 'package:modular_test/src/suite.dart';
 
diff --git a/pkg/pkg.dart b/pkg/pkg.dart
index 0cc17e68274..887037f0b11 100644
--- a/pkg/pkg.dart
+++ b/pkg/pkg.dart
@@ -4,6 +4,7 @@
 
 /// List the packages in pkg/ as well information about their
 /// analysis_options.yaml configuration.
+library;
 
 import 'dart:io';
 
diff --git a/pkg/status_file/bin/format.dart b/pkg/status_file/bin/format.dart
index eb0f2f41955..2c58e849007 100644
--- a/pkg/status_file/bin/format.dart
+++ b/pkg/status_file/bin/format.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Reformats the status file(s) at the given path.
+library;
+
 import 'dart:io';
 
 import 'package:status_file/status_file.dart';
diff --git a/pkg/status_file/lib/canonical_status_file.dart b/pkg/status_file/lib/canonical_status_file.dart
index 750e9fa30b5..d0e2d609917 100644
--- a/pkg/status_file/lib/canonical_status_file.dart
+++ b/pkg/status_file/lib/canonical_status_file.dart
@@ -347,11 +347,12 @@ class Comment {
 abstract class Entry {
   /// The one-based line number where the entry appears in the file.
   final int lineNumber;
+
   Entry(this.lineNumber);
 }
 
 class EmptyEntry extends Entry {
-  EmptyEntry(lineNumber) : super(lineNumber);
+  EmptyEntry(super.lineNumber);
 
   @override
   String toString() {
@@ -361,7 +362,8 @@ class EmptyEntry extends Entry {
 
 class CommentEntry extends Entry {
   final Comment comment;
-  CommentEntry(lineNumber, this.comment) : super(lineNumber);
+
+  CommentEntry(super.lineNumber, this.comment);
 
   @override
   String toString() {
@@ -375,8 +377,7 @@ class StatusEntry extends Entry {
   final List<Expectation> expectations;
   final Comment? comment;
 
-  StatusEntry(this.path, lineNumber, this.expectations, this.comment)
-      : super(lineNumber);
+  StatusEntry(this.path, super.lineNumber, this.expectations, this.comment);
 
   @override
   String toString() {
diff --git a/pkg/status_file/pubspec.yaml b/pkg/status_file/pubspec.yaml
index 5d73b18bbc0..43930c808fb 100644
--- a/pkg/status_file/pubspec.yaml
+++ b/pkg/status_file/pubspec.yaml
@@ -3,7 +3,7 @@ name: status_file
 publish_to: none
 
 environment:
-  sdk: "^2.12.0"
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/status_file/test/parse_and_normalize_test.dart b/pkg/status_file/test/parse_and_normalize_test.dart
index 841af03e9e6..8d64c30e14a 100644
--- a/pkg/status_file/test/parse_and_normalize_test.dart
+++ b/pkg/status_file/test/parse_and_normalize_test.dart
@@ -4,6 +4,8 @@
 
 /// Tests that every .status file in the Dart repository can be successfully
 /// parsed.
+library;
+
 import 'dart:io';
 import 'package:status_file/canonical_status_file.dart';
 
diff --git a/pkg/status_file/test/repo_status_files_test.dart b/pkg/status_file/test/repo_status_files_test.dart
index 1a910b4215b..5e845a2392b 100644
--- a/pkg/status_file/test/repo_status_files_test.dart
+++ b/pkg/status_file/test/repo_status_files_test.dart
@@ -4,6 +4,8 @@
 
 /// Tests that every .status file in the Dart repository can be successfully
 /// parsed.
+library;
+
 import 'dart:io';
 
 import 'package:expect/expect.dart';
diff --git a/pkg/test_runner/bin/launch_browser.dart b/pkg/test_runner/bin/launch_browser.dart
index 4857bbc3278..925505ed188 100644
--- a/pkg/test_runner/bin/launch_browser.dart
+++ b/pkg/test_runner/bin/launch_browser.dart
@@ -7,6 +7,7 @@
 /// The usage is:
 ///   DARTBIN launch_browser.dart BROWSER_NAME URL
 /// DARTBIN should be the checked in stable binary.
+library;
 
 import 'package:test_runner/src/browser_controller.dart';
 import 'package:test_runner/src/configuration.dart';
diff --git a/pkg/test_runner/lib/bot_results.dart b/pkg/test_runner/lib/bot_results.dart
index 6d5f111c9ef..39dc9704d1b 100644
--- a/pkg/test_runner/lib/bot_results.dart
+++ b/pkg/test_runner/lib/bot_results.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Parses results.json and flaky.json.
+library;
 
 import 'dart:async';
 import 'dart:convert';
diff --git a/pkg/test_runner/lib/src/command.dart b/pkg/test_runner/lib/src/command.dart
index 77fa6bc5cd5..7d756221875 100644
--- a/pkg/test_runner/lib/src/command.dart
+++ b/pkg/test_runner/lib/src/command.dart
@@ -90,11 +90,11 @@ class ProcessCommand extends Command {
   /// Working directory for the command.
   final String? workingDirectory;
 
-  ProcessCommand(String displayName, this.executable, this.arguments,
+  ProcessCommand(super.displayName, this.executable, this.arguments,
       [this.environmentOverrides = const {},
       this.workingDirectory,
       int index = 0])
-      : super._(displayName, index: index) {
+      : super._(index: index) {
     if (io.Platform.operatingSystem == 'windows') {
       // Windows can't handle the first command if it is a .bat file or the like
       // with the slashes going the other direction.
@@ -979,8 +979,7 @@ class Dart2WasmCommandLineCommand extends ProcessCommand {
 
 /// [ScriptCommand]s are executed by dart code.
 abstract class ScriptCommand extends Command {
-  ScriptCommand._(String displayName, {int index = 0})
-      : super._(displayName, index: index);
+  ScriptCommand._(super.displayName) : super._();
 
   Future<ScriptCommandOutput> run();
 }
diff --git a/pkg/test_runner/lib/src/command_output.dart b/pkg/test_runner/lib/src/command_output.dart
index 2e0ffe1e84f..808cd6099d4 100644
--- a/pkg/test_runner/lib/src/command_output.dart
+++ b/pkg/test_runner/lib/src/command_output.dart
@@ -1091,16 +1091,8 @@ class Dart2jsCompilerCommandOutput extends CompilationCommandOutput
   static final _errorRegexp =
       RegExp(r"^([^:]+):(\d+):(\d+):\n(Error): (.*)$", multiLine: true);
 
-  Dart2jsCompilerCommandOutput(
-      Command command,
-      int exitCode,
-      bool timedOut,
-      List<int> stdout,
-      List<int> stderr,
-      Duration time,
-      bool compilationSkipped)
-      : super(command, exitCode, timedOut, stdout, stderr, time,
-            compilationSkipped);
+  Dart2jsCompilerCommandOutput(super.command, super.exitCode, super.timedOut,
+      super.stdout, super.stderr, super.time, super.compilationSkipped);
 
   @override
   void _parseErrors() {
@@ -1130,16 +1122,8 @@ class Dart2WasmCompilerCommandOutput extends CompilationCommandOutput
   static final _errorRegexp =
       RegExp(r"^([^:]+):(\d+):(\d+): (Error): (.*)$", multiLine: true);
 
-  Dart2WasmCompilerCommandOutput(
-      Command command,
-      int exitCode,
-      bool timedOut,
-      List<int> stdout,
-      List<int> stderr,
-      Duration time,
-      bool compilationSkipped)
-      : super(command, exitCode, timedOut, stdout, stderr, time,
-            compilationSkipped);
+  Dart2WasmCompilerCommandOutput(super.command, super.exitCode, super.timedOut,
+      super.stdout, super.stderr, super.time, super.compilationSkipped);
 
   @override
   void _parseErrors() {
@@ -1166,16 +1150,14 @@ class DevCompilerCommandOutput extends CommandOutput with _StaticErrorOutput {
       multiLine: true);
 
   DevCompilerCommandOutput(
-      Command command,
-      int exitCode,
-      bool timedOut,
-      List<int> stdout,
-      List<int> stderr,
-      Duration time,
-      bool compilationSkipped,
-      int pid)
-      : super(command, exitCode, timedOut, stdout, stderr, time,
-            compilationSkipped, pid);
+      super.command,
+      super.exitCode,
+      super.timedOut,
+      super.stdout,
+      super.stderr,
+      super.time,
+      super.compilationSkipped,
+      super.pid);
 
   @override
   Expectation result(TestCase testCase) {
@@ -1229,15 +1211,13 @@ class DevCompilerCommandOutput extends CommandOutput with _StaticErrorOutput {
 
 class VMKernelCompilationCommandOutput extends CompilationCommandOutput {
   VMKernelCompilationCommandOutput(
-      Command command,
-      int exitCode,
-      bool timedOut,
-      List<int> stdout,
-      List<int> stderr,
-      Duration time,
-      bool compilationSkipped)
-      : super(command, exitCode, timedOut, stdout, stderr, time,
-            compilationSkipped);
+      super.command,
+      super.exitCode,
+      super.timedOut,
+      super.stdout,
+      super.stderr,
+      super.time,
+      super.compilationSkipped);
 
   @override
   bool get canRunDependentCommands {
@@ -1475,16 +1455,8 @@ class FastaCommandOutput extends CompilationCommandOutput
       r"^(?:([^:]+):(\d+):(\d+): )?(Context|Error|Warning): (.*)$",
       multiLine: true);
 
-  FastaCommandOutput(
-      Command command,
-      int exitCode,
-      bool hasTimedOut,
-      List<int> stdout,
-      List<int> stderr,
-      Duration time,
-      bool compilationSkipped)
-      : super(command, exitCode, hasTimedOut, stdout, stderr, time,
-            compilationSkipped);
+  FastaCommandOutput(super.command, super.exitCode, super.hasTimedOut,
+      super.stdout, super.stderr, super.time, super.compilationSkipped);
 
   @override
   void _parseErrors() {
diff --git a/pkg/test_runner/lib/src/compiler_configuration.dart b/pkg/test_runner/lib/src/compiler_configuration.dart
index b771f513b48..4522860a5c7 100644
--- a/pkg/test_runner/lib/src/compiler_configuration.dart
+++ b/pkg/test_runner/lib/src/compiler_configuration.dart
@@ -166,8 +166,7 @@ abstract class CompilerConfiguration {
 
 /// The "none" compiler.
 class NoneCompilerConfiguration extends CompilerConfiguration {
-  NoneCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  NoneCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   final bool hasCompiler = false;
@@ -205,8 +204,7 @@ class NoneCompilerConfiguration extends CompilerConfiguration {
 
 class VMKernelCompilerConfiguration extends CompilerConfiguration
     with VMKernelCompilerMixin {
-  VMKernelCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  VMKernelCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   bool get _isAot => false;
@@ -326,9 +324,8 @@ class PipelineCommand {
 class ComposedCompilerConfiguration extends CompilerConfiguration {
   final List<PipelineCommand> pipelineCommands;
 
-  ComposedCompilerConfiguration(
-      TestConfiguration configuration, this.pipelineCommands)
-      : super._subclass(configuration);
+  ComposedCompilerConfiguration(super.configuration, this.pipelineCommands)
+      : super._subclass();
 
   @override
   CommandArtifact computeCompilationArtifact(String tempDir,
@@ -390,8 +387,7 @@ class ComposedCompilerConfiguration extends CompilerConfiguration {
 class Dart2jsCompilerConfiguration extends CompilerConfiguration {
   static final Map<String, List<Uri>> _bootstrapDependenciesCache = {};
 
-  Dart2jsCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  Dart2jsCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   String computeCompilerPath() {
@@ -526,8 +522,7 @@ class Dart2jsCompilerConfiguration extends CompilerConfiguration {
 
 /// Common configuration for dart2wasm-based tools, such as dart2wasm.
 class Dart2WasmCompilerConfiguration extends CompilerConfiguration {
-  Dart2WasmCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  Dart2WasmCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   String computeCompilerPath() {
@@ -631,7 +626,7 @@ class DevCompilerConfiguration extends CompilerConfiguration {
   /// targets are output.
   final String genDir;
 
-  DevCompilerConfiguration(TestConfiguration configuration)
+  DevCompilerConfiguration(super.configuration)
       : _soundNullSafety = configuration.nnbdMode == NnbdMode.strong,
         genDir = [
           'gen/utils/ddc/',
@@ -641,7 +636,7 @@ class DevCompilerConfiguration extends CompilerConfiguration {
             'stable',
           if (configuration.nnbdMode != NnbdMode.strong) '_unsound'
         ].join(),
-        super._subclass(configuration);
+        super._subclass();
 
   @override
   String computeCompilerPath() {
@@ -859,8 +854,7 @@ class PrecompilerCompilerConfiguration extends CompilerConfiguration
   @override
   bool get _isAot => true;
 
-  PrecompilerCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  PrecompilerCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   int get timeoutMultiplier {
@@ -1201,8 +1195,7 @@ class PrecompilerCompilerConfiguration extends CompilerConfiguration
 }
 
 class AppJitCompilerConfiguration extends CompilerConfiguration {
-  AppJitCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  AppJitCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   int get timeoutMultiplier {
@@ -1284,8 +1277,7 @@ class AppJitCompilerConfiguration extends CompilerConfiguration {
 
 /// Configuration for dartanalyzer.
 class AnalyzerCompilerConfiguration extends CompilerConfiguration {
-  AnalyzerCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  AnalyzerCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   int get timeoutMultiplier => 4;
@@ -1354,8 +1346,7 @@ class AnalyzerCompilerConfiguration extends CompilerConfiguration {
 
 /// Configuration for spec_parser.
 class SpecParserCompilerConfiguration extends CompilerConfiguration {
-  SpecParserCompilerConfiguration(TestConfiguration configuration)
-      : super._subclass(configuration);
+  SpecParserCompilerConfiguration(super.configuration) : super._subclass();
 
   @override
   String computeCompilerPath() => 'tools/spec_parse.py';
diff --git a/pkg/test_runner/lib/src/multitest.dart b/pkg/test_runner/lib/src/multitest.dart
index 26543875a75..7b21b39e3d2 100644
--- a/pkg/test_runner/lib/src/multitest.dart
+++ b/pkg/test_runner/lib/src/multitest.dart
@@ -66,6 +66,8 @@
 /// ddd //# 07: static type warning
 /// fff
 /// ```
+library;
+
 import "dart:io";
 
 import "path.dart";
diff --git a/pkg/test_runner/lib/src/test_file.dart b/pkg/test_runner/lib/src/test_file.dart
index 4518a34e9ba..3f431ba782b 100644
--- a/pkg/test_runner/lib/src/test_file.dart
+++ b/pkg/test_runner/lib/src/test_file.dart
@@ -337,7 +337,7 @@ class TestFile extends _TestFileBase {
         isVmIntermediateLanguageTest = false,
         super(null, Path("/fake/vm/cc/$name"), []);
 
-  TestFile._(Path suiteDirectory, Path path, List<StaticError> expectedErrors,
+  TestFile._(Path super.suiteDirectory, super.path, super.expectedErrors,
       {this.packages,
       required this.environment,
       required this.isMultitest,
@@ -356,8 +356,7 @@ class TestFile extends _TestFileBase {
         hasCompileError = false,
         hasRuntimeError = false,
         hasStaticWarning = false,
-        hasCrash = false,
-        super(suiteDirectory, path, expectedErrors) {
+        hasCrash = false {
     assert(!isMultitest || dartOptions.isEmpty);
   }
 
diff --git a/pkg/test_runner/lib/src/test_progress.dart b/pkg/test_runner/lib/src/test_progress.dart
index 85f31006911..8c798cf74d5 100644
--- a/pkg/test_runner/lib/src/test_progress.dart
+++ b/pkg/test_runner/lib/src/test_progress.dart
@@ -445,14 +445,13 @@ abstract class ProgressIndicator extends EventListener {
 }
 
 abstract class CompactIndicator extends ProgressIndicator {
-  CompactIndicator(DateTime startTime) : super(startTime);
+  CompactIndicator(super.startTime);
 }
 
 class CompactProgressIndicator extends CompactIndicator {
   final Formatter _formatter;
 
-  CompactProgressIndicator(DateTime startTime, this._formatter)
-      : super(startTime);
+  CompactProgressIndicator(super.startTime, this._formatter);
 
   @override
   void _printDoneProgress(TestCase test) {
@@ -474,7 +473,7 @@ class CompactProgressIndicator extends CompactIndicator {
 }
 
 class LineProgressIndicator extends ProgressIndicator {
-  LineProgressIndicator(DateTime startTime) : super(startTime);
+  LineProgressIndicator(super.startTime);
 
   @override
   void _printDoneProgress(TestCase test) {
@@ -490,7 +489,7 @@ class LineProgressIndicator extends ProgressIndicator {
 class BuildbotProgressIndicator extends ProgressIndicator {
   static String? stepName;
 
-  BuildbotProgressIndicator(DateTime startTime) : super(startTime);
+  BuildbotProgressIndicator(super.startTime);
 
   @override
   void _printDoneProgress(TestCase test) {
diff --git a/pkg/test_runner/lib/src/test_suite.dart b/pkg/test_runner/lib/src/test_suite.dart
index 275cfb57fbd..cb7a61f77c4 100644
--- a/pkg/test_runner/lib/src/test_suite.dart
+++ b/pkg/test_runner/lib/src/test_suite.dart
@@ -10,6 +10,8 @@
 ///   and creating [TestCase]s for those files that meet the relevant criteria.
 /// - Preparing tests, including copying files and frameworks to temporary
 ///   directories, and computing the command line and arguments to be run.
+library;
+
 import 'dart:io';
 import 'dart:math';
 
diff --git a/pkg/test_runner/pubspec.yaml b/pkg/test_runner/pubspec.yaml
index 713ec19ccb0..31396d4768a 100644
--- a/pkg/test_runner/pubspec.yaml
+++ b/pkg/test_runner/pubspec.yaml
@@ -7,7 +7,7 @@ name: test_runner
 publish_to: none
 
 environment:
-  sdk: '>=2.16.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:
diff --git a/pkg/test_runner/tool/convert_multitest.dart b/pkg/test_runner/tool/convert_multitest.dart
index 5f349cf3d6c..4b0ce36ab50 100644
--- a/pkg/test_runner/tool/convert_multitest.dart
+++ b/pkg/test_runner/tool/convert_multitest.dart
@@ -5,6 +5,7 @@
 /// Converts a multi-test to a test using the new static error test framework
 /// (see https://github.com/dart-lang/sdk/wiki/Testing#static-error-tests)
 /// and a copy of the '/none' test.
+library;
 
 import 'dart:collection';
 import 'dart:convert';
diff --git a/pkg/test_runner/tool/orphan_files.dart b/pkg/test_runner/tool/orphan_files.dart
index d5785de7fae..8021b099528 100644
--- a/pkg/test_runner/tool/orphan_files.dart
+++ b/pkg/test_runner/tool/orphan_files.dart
@@ -8,6 +8,8 @@
 ///
 /// Usually this means that someone accidentally left off the "_test" and the
 /// file is supposed to be a test but is silently getting ignored.
+library;
+
 import 'dart:io';
 
 import 'package:analyzer/dart/analysis/analysis_context.dart';
diff --git a/pkg/test_runner/tool/update_static_error_tests.dart b/pkg/test_runner/tool/update_static_error_tests.dart
index bf34b696d8c..668ceb6f479 100644
--- a/pkg/test_runner/tool/update_static_error_tests.dart
+++ b/pkg/test_runner/tool/update_static_error_tests.dart
@@ -4,6 +4,8 @@
 
 /// Regenerates the static error test markers inside static error tests based
 /// on the actual errors reported by analyzer and CFE.
+library;
+
 import 'dart:io';
 
 import 'package:args/args.dart';
diff --git a/pkg/vm/bin/kernel_service.dart b/pkg/vm/bin/kernel_service.dart
index d2bdbb81b7f..1f78dd4041f 100644
--- a/pkg/vm/bin/kernel_service.dart
+++ b/pkg/vm/bin/kernel_service.dart
@@ -18,6 +18,7 @@
 ///         dart pkg/vm/bin/kernel_service.dart --train <source-file>
 ///
 ///
+library;
 
 import 'dart:async' show Future, ZoneSpecification, runZoned;
 import 'dart:collection' show UnmodifiableMapBase;
diff --git a/pkg/vm/lib/incremental_compiler.dart b/pkg/vm/lib/incremental_compiler.dart
index 271447abe5d..0a6301f7000 100644
--- a/pkg/vm/lib/incremental_compiler.dart
+++ b/pkg/vm/lib/incremental_compiler.dart
@@ -4,6 +4,8 @@
 
 /// Defines wrapper class around incremental compiler to support
 /// the flow, where incremental deltas can be rejected by VM.
+library;
+
 import 'dart:async';
 import 'dart:developer';
 
diff --git a/pkg/vm/lib/kernel_front_end.dart b/pkg/vm/lib/kernel_front_end.dart
index c6d199f7bb8..e742b08fb45 100644
--- a/pkg/vm/lib/kernel_front_end.dart
+++ b/pkg/vm/lib/kernel_front_end.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Defines the VM-specific translation of Dart source code to kernel binaries.
+library;
 
 import 'dart:async';
 import 'dart:io' show File, IOSink;
diff --git a/pkg/vm/lib/testing/il_matchers.dart b/pkg/vm/lib/testing/il_matchers.dart
index be157bfd7b8..3d256ab0fb4 100644
--- a/pkg/vm/lib/testing/il_matchers.dart
+++ b/pkg/vm/lib/testing/il_matchers.dart
@@ -5,6 +5,8 @@
 /// A library to facilitate programmatic matching against flow graphs
 /// collected during IL tests. See runtime/docs/infra/il_tests.md for more
 /// info.
+library;
+
 import 'dart:io';
 
 typedef Renamer = String Function(String);
diff --git a/pkg/vm/lib/transformations/type_flow/analysis.dart b/pkg/vm/lib/transformations/type_flow/analysis.dart
index bcfcae8f8b5..360e9fb65e5 100644
--- a/pkg/vm/lib/transformations/type_flow/analysis.dart
+++ b/pkg/vm/lib/transformations/type_flow/analysis.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Global type flow analysis.
+library;
 
 import 'dart:collection';
 import 'dart:core' hide Type;
diff --git a/pkg/vm/lib/transformations/type_flow/calls.dart b/pkg/vm/lib/transformations/type_flow/calls.dart
index dd16279d343..e83825afbf1 100644
--- a/pkg/vm/lib/transformations/type_flow/calls.dart
+++ b/pkg/vm/lib/transformations/type_flow/calls.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Declares classes which describe a call: selectors and arguments.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/native_code.dart b/pkg/vm/lib/transformations/type_flow/native_code.dart
index 4a3444ae082..d8a85813f9a 100644
--- a/pkg/vm/lib/transformations/type_flow/native_code.dart
+++ b/pkg/vm/lib/transformations/type_flow/native_code.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Handling of native code and entry points.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/rta.dart b/pkg/vm/lib/transformations/type_flow/rta.dart
index 5dc9dc84aea..6009b99fbd8 100644
--- a/pkg/vm/lib/transformations/type_flow/rta.dart
+++ b/pkg/vm/lib/transformations/type_flow/rta.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Rapid type analysis on kernel AST.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/summary.dart b/pkg/vm/lib/transformations/type_flow/summary.dart
index 94733bcdd2b..8ca5d00a40a 100644
--- a/pkg/vm/lib/transformations/type_flow/summary.dart
+++ b/pkg/vm/lib/transformations/type_flow/summary.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Type flow summary of a member, function or initializer.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/summary_collector.dart b/pkg/vm/lib/transformations/type_flow/summary_collector.dart
index 3b3a47f0b05..2e2f267ba59 100644
--- a/pkg/vm/lib/transformations/type_flow/summary_collector.dart
+++ b/pkg/vm/lib/transformations/type_flow/summary_collector.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Creation of type flow summaries out of kernel AST.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/transformer.dart b/pkg/vm/lib/transformations/type_flow/transformer.dart
index 89d8242d358..81bc828220a 100644
--- a/pkg/vm/lib/transformations/type_flow/transformer.dart
+++ b/pkg/vm/lib/transformations/type_flow/transformer.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Transformations based on type flow analysis.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm/lib/transformations/type_flow/types.dart b/pkg/vm/lib/transformations/type_flow/types.dart
index cc517df9140..22f0bb4b50e 100644
--- a/pkg/vm/lib/transformations/type_flow/types.dart
+++ b/pkg/vm/lib/transformations/type_flow/types.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Declares the type system used by global type flow analysis.
+library;
 
 import 'dart:core' hide Type;
 
diff --git a/pkg/vm_service/java/version.properties b/pkg/vm_service/java/version.properties
index 94ffe2ee6ac..b40abb14b70 100644
--- a/pkg/vm_service/java/version.properties
+++ b/pkg/vm_service/java/version.properties
@@ -1 +1 @@
-version=4.14
+version=4.13
diff --git a/pkg/vm_service/lib/src/vm_service.dart b/pkg/vm_service/lib/src/vm_service.dart
index 7659cb39d0c..0dbb2549f1c 100644
--- a/pkg/vm_service/lib/src/vm_service.dart
+++ b/pkg/vm_service/lib/src/vm_service.dart
@@ -7,6 +7,7 @@
 /// A library to access the VM Service API.
 ///
 /// The main entry-point for this library is the [VmService] class.
+library;
 
 // ignore_for_file: overridden_fields
 
diff --git a/pkg/vm_service/tool/dart/generate_dart.dart b/pkg/vm_service/tool/dart/generate_dart.dart
index b1f88ef7e1f..032c9aed191 100644
--- a/pkg/vm_service/tool/dart/generate_dart.dart
+++ b/pkg/vm_service/tool/dart/generate_dart.dart
@@ -44,6 +44,7 @@ final String _headerCode = r'''
 /// A library to access the VM Service API.
 ///
 /// The main entry-point for this library is the [VmService] class.
+library;
 
 // ignore_for_file: overridden_fields
 
diff --git a/pkg/wasm_builder/lib/src/ir/ir.dart b/pkg/wasm_builder/lib/src/ir/ir.dart
index 7b106dff366..5c81202ccee 100644
--- a/pkg/wasm_builder/lib/src/ir/ir.dart
+++ b/pkg/wasm_builder/lib/src/ir/ir.dart
@@ -4,6 +4,7 @@
 
 /// IR types are considered logically immutable.
 // TODO(joshualitt): Make all of the ir types full immutable.
+library;
 
 export 'data_segments.dart' show BaseDataSegment, DataSegment, DataSegments;
 export 'exports.dart' show Export, Exportable, Exports;
diff --git a/pkg/wasm_builder/pubspec.yaml b/pkg/wasm_builder/pubspec.yaml
index 05ece996ca1..cd01bc50bee 100644
--- a/pkg/wasm_builder/pubspec.yaml
+++ b/pkg/wasm_builder/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 description: Generate binary Wasm modules
 
 environment:
-  sdk: '>=2.17.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dev_dependency:
diff --git a/sdk/lib/_internal/js_runtime/lib/synced/async_status_codes.dart b/sdk/lib/_internal/js_runtime/lib/synced/async_status_codes.dart
index a1190ff39c2..a3d9ceec34e 100644
--- a/sdk/lib/_internal/js_runtime/lib/synced/async_status_codes.dart
+++ b/sdk/lib/_internal/js_runtime/lib/synced/async_status_codes.dart
@@ -6,6 +6,7 @@
 
 /// Codes that transformed sync*/async/async* functions use to communicate with
 /// js_helper functions.
+library;
 
 const int SUCCESS = 0;
 const int ERROR = 1;
diff --git a/tools/generate_package_config.dart b/tools/generate_package_config.dart
index e6578fd72a5..18aa1734158 100644
--- a/tools/generate_package_config.dart
+++ b/tools/generate_package_config.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Generates the repo's ".dart_tool/package_config.json" file.
+library;
+
 import 'dart:convert';
 import 'dart:io';