flutter常用pub库

#https://github.com/flutterchina/dio/blob/master/README-ZH.md

 dio: ^3.0.9 #网络请求框架

 cookie_jar: ^1.0.1

 dio_cookie_manager: ^1.0.0

 path_provider: ^1.6.7

 event_bus: ^1.1.1

 #https://pub.flutter-io.cn/packages/connectivity

 connectivity: ^0.4.8+2 #链接网络状态监测

 fluttertoast: ^4.0.1

 shared_preferences: ^0.5.6+3

 pull_to_refresh: ^1.5.7

 modal_progress_hud: ^0.1.3
 
 webview_flutter: ^0.3.20+2