backup. before shop update

lib/store/reducer/fcmtoken_reducer.dart

@@ -0,0 +1,11 @@
+import 'package:redux/redux.dart';
+
+import '../actions.dart';
+
+final fcmtokenReducer = combineReducers<String>([
+  TypedReducer<String, UpdateFcmToken>(_updateFcmToken)
+]);
+
+String _updateFcmToken(String token, action) {
+  return action.token;
+}