bump to 0.6.2

CHANGELOG.md

+## 0.6.2
+
+* 对android进行了升级
+
 ## 0.6.1
 * 支持二维码登录
 

pubspec.yaml

 name: fluwx
 description: A implement of WeChatSDK on Flutter.Fluwx makes possible using WeChatSDK in Flutter.Enjoy sharing or payment in Flutter.
-version: 0.6.1
+version: 0.6.2
 author: JarvanMo <jarvan.mo@gmail.com>
 homepage: https://github.com/JarvanMo/fluwx