chore(deps): update dependency dart to v3.4.0

[renovate]

This PR contains the following updates:

Package	Update	Change
dart (source)	minor	3.3.4 -> 3.4.0

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Release Notes

dart-lang/sdk (dart)

v3.4.0

Compare Source

Language

Dart 3.4 makes improvements to the type analysis of conditional expressions
(e1 ? e2 : e3), if-null expressions (e1 ?? e2), if-null assignments
(e1 ??= e2), and switch expressions (switch (e) { p1 => e1, ... }). To take
advantage of these improvements, set your package's
SDK constraint lower bound to 3.4 or greater
(sdk: '^3.4.0').

• Breaking Change #​54640: The pattern context type schema for
  cast patterns has been changed from Object? to _ (the unknown
  type), to align with the specification. This change is not expected
  to make any difference in practice.

• Breaking Change #​54828: The type schema used by the compiler front end
  to perform type inference on the operand of a null-aware spread operator
  (...?) in map and set literals has been made nullable, to match what
  currently happens in list literals. This makes the compiler front end behavior
  consistent with that of the analyzer. This change is expected to be very low
  impact.

Libraries

dart:async

• Added option for ParallelWaitError to get some meta-information that
  it can expose in its toString, and the Iterable<Future>.wait and
  (Future,...,Future).wait extension methods now provide that information.
  Should make a ParallelWaitError easier to log.

dart:cli

• Breaking change [#​52121][]: waitFor is removed in 3.4.

dart:ffi

• Added Struct.create and Union.create to create struct and union views
  of the sequence of bytes stored in a subtype of TypedData.

dart:io

• Breaking change #​53863: Stdout has a new field lineTerminator,
  which allows developers to control the line ending used by stdout and
  stderr. Classes that implement Stdout must define the lineTerminator
  field. The default semantics of stdout and stderr are not changed.

• Deprecates FileSystemDeleteEvent.isDirectory, which always returns
  false.

dart:js_interop

• Fixes an issue with several comparison operators in JSAnyOperatorExtension
  that were declared to return JSBoolean but really returned bool. This led
  to runtime errors when trying to use the return values. The implementation now
  returns a JSBoolean to align with the interface. See issue #​55024 for
  more details.

• Added ExternalDartReference and related conversion functions
  toExternalReference and toDartObject. This is a faster alternative to
  JSBoxedDartObject, but with fewer safety guarantees and fewer
  interoperability capabilities. See #​55187 for more details.

• On dart2wasm, JSBoxedDartObject now is an actual JS object that wraps the
  opaque Dart value instead of only externalizing the value. Like the JS
  backends, you'll now get a more useful error when trying to use it in another
  Dart runtime.

• Added isA helper to make type checks easier with interop types. See
  #​54138 for more details.

dart:typed_data

• BREAKING CHANGE #​53218 #​53785: The unmodifiable view classes for
  typed data are deprecated.

  To create an unmodifiable view of a typed-data object, use the
  asUnmodifiableView() methods added in Dart 3.3:

  Uint8List data = ...;
  final readOnlyView = data.asUnmodifiableView();
  // readOnlyView has type Uint8List, and throws if attempted modified.

  The reason for this change is to allow more flexibility in the implementation
  of typed data, so the native and web platforms can use different strategies
  to ensure that typed data has good performance.

  The deprecated types will be removed in Dart 3.5.

Tools

Analyzer

• Improved code completion. Fixed over 50% of completion correctness bugs,
  tagged analyzer-completion-correctness in the issue
  tracker.

• Support for new annotations introduced in version 1.14.0 of the meta
  package.

  • Support for the [@doNotSubmit][@​doNotSubmit] annotation, noting that any usage of an
    annotated member should not be submitted to source control.

  • Support for the [@mustBeConst][@​mustBeConst] annotation, which indicates that an
    annotated parameter only accepts constant arguments.

Linter

• Added the [unnecessary_library_name][unnecessary_library_name] lint.
• Added the [missing_code_block_language_in_doc_comment][missing_code_block_language_in_doc_comment] lint.

Compilers

• The compilation environment will no longer pretend to contain entries with
  value "" for all dart.library.foo strings, where dart:foo is not an
  available library. Instead there will only be entries for the available
  libraries, like dart.library.core, where the value was, and still is,
  "true". This should have no effect on const bool.fromEnvironment(...) or
  const String.fromEnvironment(...) without a defaultValue argument, an
  argument which was always ignored previously. It changes the behavior of
  const bool.hasEnvironment(...) on such an input, away from always being
  true and therefore useless.

DevTools

• Updated DevTools to version 2.33.0 from 2.31.1.
  To learn more, check out the release notes for versions
  2.32.0 and 2.33.0.

Pub

• Dependency resolution and dart pub outdated will now surface if a dependency
  is affected by a security advisory, unless the advisory is listed under a
  ignored_advisories section in the pubspec.yaml file. To learn more about
  pub's support for security advisories, visit
  dart.dev/go/pub-security-advisories.

• path-dependencies inside git-dependencies are now resolved relative to the
  git repo.

• All dart pub commands can now be run from any subdirectory of a project. Pub
  will find the first parent directory with a pubspec.yaml and operate
  relative it.

• New command dart pub unpack that downloads a package from pub.dev and
  extracts it to a subfolder of the current directory.

  This can be useful for inspecting the code, or playing with examples.

Dart Runtime

• Dart VM flags and options can now be provided to any executable generated
  using dart compile exe via the DART_VM_OPTIONS environment variable.
  DART_VM_OPTIONS should be set to a list of comma-separated flags and options
  with no whitespace. Options that allow for multiple values to be provided as
  comma-separated values are not supported (e.g.,
  --timeline-streams=Dart,GC,Compiler).

  Example of a valid DART_VM_OPTIONS environment variable:

  DART_VM_OPTIONS=--random_seed=42,--verbose_gc

• Dart VM no longer supports external strings: Dart_IsExternalString,
  Dart_NewExternalLatin1String and Dart_NewExternalUTF16String functions are
  removed from Dart C API.

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Configuration

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This PR has been generated by Mend Renovate. View repository job log here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.29%. Comparing base (412b4a1) to head (6df5e01).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
+ Coverage   79.85%   80.29%   +0.43%     
==========================================
  Files          32       32              
  Lines         685      685              
==========================================
+ Hits          547      550       +3     
+ Misses        138      135       -3     

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