Update .gitignore to new `dart_tool` pub cache (#31)
Update .gitignore to new `dart_tool` pub cache (#31)

dart-lang/sdk#32030
dart-lang/shelf,kevmoo/shelf_static.dart,dart-lang/shelf,kevmoo/shelf_static.dart,kevmoo/shelf_static.dart,dart-lang/shelf,dart-archive/shelf_static,dart-lang/shelf_static,dart-lang/shelf_static,dart-archive/shelf_static