package:test v1.24.5

• Change "compiling " to "loading " message in all cases. Surface the "loading" messages in the situations where previously only "compiling" message would be used.* Support browser tests where the frame creates the message channel.

package:test_core v0.5.4

• Drop support for null unsafe Dart, bump SDK constraint to 3.0.0.
• Add final modifier on some implementation classes: Configuration,
  CustomRuntime,RuntimeSettings, SuiteConfiguration.
• Fix the root_ fields in the JSON reporter when running a test on Windows
  with an absolute path.
• Allow the latest analyzer (6.x.x).

package:test_api v0.6.1

• Drop support for null unsafe Dart, bump SDK constraint to 3.0.0.
• Make some implementation classes final. These classes were never intended to
  be extended or implemented. Metadata, PlatformSelector, RemoteListener,
  Runtime, StackTraceFormatter, SuitePlatform, RemoteException,
  TestHandle, OutstandingWork, OutsideTestException, OnPlatform,
  Retry, Skip, Tags, TestOn, Timeout.
• Mark an implementation class interface: StackTraceMapper.
• Change the Compiler class into an enum.
• Make Fake a mixin class.
• Allow the latest analyzer (6.x.x).

package:test v1.24.4

• Drop support for null unsafe Dart, bump SDK constraint to 3.0.0.
• Make some annotation classes final: OnPlatform, Retry, Skip, Tags,
  TestOn, Timeout.
• Fix the root_ fields in the JSON reporter when running a test on Windows
  with an absolute path.
• Add support for SAFARI_EXECUTABLE, FIREFOX_EXECUTABLE and
  MS_EDGE_EXECUTABLE for custom browser installations.
• Allow the latest analyzer (6.x.x).
• Add MOZ_AUTOMATION=1 environmental variable to Firefox runner, to make
  launcher process on Windows wait for browser exit.

test_v1.16.0-nullsafety.5-dev: Avoid importing all of test_core from load_suite (#1337)

This will make it easier to separate the package into more fine grained
targets.

Other minor cleanup:
- Remove a stale ignore from when DDC struggled with conditional
  imports.
- Fix some lints about unnecessary `this`.

test_1.16.0-nullsafety.4

Update package:vm_service dependency (#1334)

test_v1.12.0

Add missing constraint (#1167)

test_core-v0.3.0

Add missing constraint (#1167)

test_api_v0.2.14

Add missing constraint (#1167)

test_v1.9.2

Prep to publish (#1097)