package:test v1.31.2

• Add support for running tests as native CLI bundles (vm platform only).
  • You can run tests this way with --compiler cli.
• Impacts Configuration Support using the OS platform selector to configure
  browser tests.
  Previously tests loaded for the browser would have an operating system of
  "none", now they will have an operating system matching the system the browser
  is running on. This allows more specific configuration, such as skipping a
  particular browser test on a particular platform. This may impact existing
  configuration which relied on the configuration for browser tests being
  independent from any OS specific configuration. For instance a wide skip of
  all tests with OS 'windows' would previously still run browser tests on
  windows, but will now skip all tests including browser tests.
• Use a DevTools URL instead of a defunct observatory URL.
• Disable throttling in chrome launch arguments.
• Allow package_config 3.x.x.
• Require analyzer: '>=13.0.0 <15.0.0'
• Use the compact or failures-only reporters by default for tests run directly
  instead of through the test runner.