Revert "Bump dart-lang/setup-dart from 1.4.0 to 1.5.0 (dart-lang/pubspec_parse#100)" (dart-lang/pubspec_parse#101)

This reverts commit 6789ce31ca88aa65cd737e94ad3234124edd5eac.
1 file changed
tree: 1885624050fb98866fd344b22df9236b61d8f125
  1. pkgs/