Revert "Bump dart-lang/setup-dart from 1.4.0 to 1.5.0 (dart-lang/pubspec_parse#95)" (dart-lang/pubspec_parse#99)

This reverts commit adcd711141602fb7a1d35c9ca09ecc6926062b0a.
1 file changed
tree: 0a06ad8f148ee267cb2713b6d8f7c16f14d5538a
  1. pkgs/