wrappers registration + redux

main.dart

void main() {
  final store = Store<int>(counterReducer, initialState: 0);
  Flutter.registerWrapperWidget(StoreProvider(store: store)); // proposed API

  runApp();
}

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Home(),
    );
  }
}