upgrade: update dependency dart to v3.1.0

[renovate]

This PR contains the following updates:

Package	Update	Change
dart (source)	minor	3.0.6 -> 3.1.0

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Release Notes

dart-lang/sdk (dart)

v3.1.0

Compare Source

Libraries

dart:async

• Breaking change #​52334:
  • Added the interface modifier to purely abstract classes:
    MultiStreamController, StreamConsumer, StreamIterator and
    StreamTransformer. As a result, these types can only be implemented,
    not extended or mixed in.

dart:convert

• Breaking change #​52801:
  • Changed return types of utf8.encode() and Utf8Codec.encode() from
    List<int> to Uint8List.

dart:core

• Uri.base on native platforms now respects IOOverrides overriding
  current directory (#​39796).

dart:io

• Breaking change #​51486:
  • Added sameSite to the Cookie class.
  • Added class SameSite.
• Breaking change #​52027: FileSystemEvent is
  sealed. This means
  that FileSystemEvent cannot be extended or implemented.
• Added a deprecation warning when Platform is instantiated.
• Added Platform.lineTerminator which exposes the character or characters
  that the operating system uses to separate lines of text, e.g.,
  "\r\n" on Windows.

dart:isolate

• Added Isolate.packageConfigSync and Isolate.resolvePackageUriSync APIs.

dart:js_interop

• Object literal constructors:
  ObjectLiteral is removed from dart:js_interop. It's no longer needed in
  order to declare an object literal constructor with inline classes. As long as
  an external constructor has at least one named parameter, it'll be treated as
  an object literal constructor. If you want to create an object literal with no
  named members, use {}.jsify().

Other libraries

package:js

• Breaking change to @staticInterop and external extension members:
  external @staticInterop members and external extension members can no
  longer be used as tear-offs. Declare a closure or a non-external method that
  calls these members, and use that instead.
• Breaking change to @staticInterop and external extension members:
  external @staticInterop members and external extension members will
  generate slightly different JS code for methods that have optional parameters.
  Whereas before, the JS code passed in the default value for missing optionals,
  it will now pass in only the provided members. This aligns with how JS
  parameters work, where omitted parameters are actually omitted. For example,
  calling external void foo([int a, int b]) as foo(0) will now result in
  foo(0), and not foo(0, null).

v3.0.7

Compare Source

This is a patch release that:

• Fixes a bug in dart2js which would cause certain uses of records to lead to
  bad codegen causing a TypeError or NoSuchMethodError to be thrown
  at runtime (issue #​53001).

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[ronnnnn]

wait until Flutter depends on this version.
https://docs.flutter.dev/release/archive

[renovate]

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