update logout

Author: CarGuo

lib/redux/login_redux.dart

@@ -6,6 +6,7 @@ import 'package:gsy_github_app_flutter/common/utils/common_utils.dart';
 import 'package:gsy_github_app_flutter/common/utils/navigator_utils.dart';
 import 'package:redux/redux.dart';
 import 'package:rxdart/rxdart.dart';
+import 'package:webview_flutter/webview_flutter.dart';
 import 'middleware/epic_store.dart';
 
 /**
@@ -62,6 +63,7 @@ class LoginMiddleware implements MiddlewareClass<GSYState> {
   void call(Store<GSYState> store, dynamic action, NextDispatcher next) {
     if (action is LogoutAction) {
       UserDao.clearAll(store);
+      CookieManager().clearCookies();
       SqlManager.close();
       NavigatorUtils.goLogin(action.context);
     }