[infra] bump lint packages

[goderbauer]

Bumping the linting related packages:

• pkg:dart_flutter_team_lints to 3.5.2
• pkg:lints to 6.0.0
• pkg:flutter_lints to 6.0.0

[github-actions]

PR Health

Changelog Entry ❗

Package	Changed Files
package:code_assets	pkgs/code_assets/pubspec.yaml
package:data_assets	pkgs/data_assets/pubspec.yaml
package:ffi	pkgs/ffi/pubspec.yaml
package:hooks	pkgs/hooks/example/build/download_asset/pubspec.yaml pkgs/hooks/example/build/local_asset/pubspec.yaml pkgs/hooks/example/build/native_add_app/pubspec.yaml pkgs/hooks/example/build/native_add_library/pubspec.yaml pkgs/hooks/example/build/native_dynamic_linking/pubspec.yaml pkgs/hooks/example/build/system_library/pubspec.yaml pkgs/hooks/example/build/use_dart_api/pubspec.yaml pkgs/hooks/example/link/app_with_asset_treeshaking/pubspec.yaml pkgs/hooks/example/link/package_with_assets/pubspec.yaml pkgs/hooks/pubspec.yaml
package:hooks_runner	pkgs/hooks_runner/pubspec.yaml pkgs/hooks_runner/test_data/add_asset_link/pubspec.yaml pkgs/hooks_runner/test_data/complex_link/pubspec.yaml pkgs/hooks_runner/test_data/complex_link_helper/pubspec.yaml pkgs/hooks_runner/test_data/cyclic_package_1/pubspec.yaml pkgs/hooks_runner/test_data/cyclic_package_2/pubspec.yaml pkgs/hooks_runner/test_data/depend_on_fail_build/pubspec.yaml pkgs/hooks_runner/test_data/depend_on_fail_build_app/pubspec.yaml pkgs/hooks_runner/test_data/dev_dependency_with_hook/pubspec.yaml pkgs/hooks_runner/test_data/drop_dylib_link/pubspec.yaml pkgs/hooks_runner/test_data/fail_build/pubspec.yaml pkgs/hooks_runner/test_data/fail_on_os_sdk_version/pubspec.yaml pkgs/hooks_runner/test_data/fail_on_os_sdk_version_link/pubspec.yaml pkgs/hooks_runner/test_data/fail_on_os_sdk_version_linker/pubspec.yaml pkgs/hooks_runner/test_data/infra_failure/pubspec.yaml pkgs/hooks_runner/test_data/native_add/pubspec.yaml pkgs/hooks_runner/test_data/native_add_add_source/pubspec.yaml pkgs/hooks_runner/test_data/native_add_duplicate/pubspec.yaml pkgs/hooks_runner/test_data/native_add_version_skew/pubspec.yaml pkgs/hooks_runner/test_data/native_add_version_skew_2/pubspec.yaml pkgs/hooks_runner/test_data/native_dynamic_linking/pubspec.yaml pkgs/hooks_runner/test_data/native_subtract/pubspec.yaml pkgs/hooks_runner/test_data/no_asset_for_link/pubspec.yaml pkgs/hooks_runner/test_data/no_hook/pubspec.yaml pkgs/hooks_runner/test_data/package_reading_metadata/pubspec.yaml pkgs/hooks_runner/test_data/package_with_metadata/pubspec.yaml pkgs/hooks_runner/test_data/relative_path/pubspec.yaml pkgs/hooks_runner/test_data/reusable_dynamic_library/pubspec.yaml pkgs/hooks_runner/test_data/reuse_dynamic_library/pubspec.yaml pkgs/hooks_runner/test_data/simple_data_asset/pubspec.yaml pkgs/hooks_runner/test_data/simple_link/pubspec.yaml pkgs/hooks_runner/test_data/system_library/pubspec.yaml pkgs/hooks_runner/test_data/transformer/pubspec.yaml pkgs/hooks_runner/test_data/treeshaking_native_libs/pubspec.yaml pkgs/hooks_runner/test_data/use_all_api/pubspec.yaml pkgs/hooks_runner/test_data/user_defines/pubspec.yaml pkgs/hooks_runner/test_data/wrong_build_output/pubspec.yaml pkgs/hooks_runner/test_data/wrong_build_output_2/pubspec.yaml pkgs/hooks_runner/test_data/wrong_build_output_3/pubspec.yaml pkgs/hooks_runner/test_data/wrong_linker/pubspec.yaml pkgs/hooks_runner/test_data/wrong_namespace_asset/pubspec.yaml
package:jni	pkgs/jni/example/pubspec.yaml pkgs/jni/pubspec.yaml
package:native_doc_dartifier	pkgs/native_doc_dartifier/pubspec.yaml
package:native_toolchain_c	pkgs/native_toolchain_c/pubspec.yaml
package:objective_c	pkgs/objective_c/example/pubspec.yaml pkgs/objective_c/pubspec.yaml

Changes to files need to be accounted for in their respective changelogs.

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API leaks ⚠️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbols
ffi	MallocAllocator CallocAllocator
jni	_JFinalizable _ReferenceType _opaque_pthread_mutex_t _opaque_pthread_cond_t _Dart_FinalizableHandle
objective_c	_FinalizablePointer _Version

This check can be disabled by tagging the PR with skip-leaking-check.

License Headers ✔️

// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

Files
no missing headers

All source files should start with a license header.

Unrelated files missing license headers

Files
pkgs/jni/lib/src/third_party/generated_bindings.dart
pkgs/native_doc_dartifier/example/native_doc_dartifier_example.dart
pkgs/native_doc_dartifier/lib/native_doc_dartifier.dart
pkgs/native_doc_dartifier/lib/src/native_doc_dartifier_base.dart
pkgs/objective_c/lib/src/ns_input_stream.dart

[coveralls]

coverage: 88.001%. remained the same
when pulling e8d108d on goderbauer:bump-linter
into 5eadfaf on dart-lang:main.