Bump dart-lang/setup-dart from 1.4.0 to 1.5.0 (dart-lang/string_scanner#56)

Bumps [dart-lang/setup-dart](https://github.com/dart-lang/setup-dart) from 1.4.0 to 1.5.0.
- [Release notes](https://github.com/dart-lang/setup-dart/releases)
- [Changelog](https://github.com/dart-lang/setup-dart/blob/main/CHANGELOG.md)
- [Commits](https://github.com/dart-lang/setup-dart/compare/a57a6c04cf7d4840e88432aad6281d1e125f0d46...d6a63dab3335f427404425de0fbfed4686d93c4f)

---
updated-dependencies:
- dependency-name: dart-lang/setup-dart
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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1 file changed
tree: 640a0f648be7c6b9bc065adb87fc96e89b64bb09
  1. pkgs/