bump to 2.6.0

CHANGELOG.md

+## 2.6.0
+* Android支持通过H5冷启动app传递<wx-open-launch-app>中的extinfo数据
+* Android新加<meta-data>handleWeChatRequestByFluwx</meta-data>。
+
 ## 2.5.0
 * App获取开放标签<wx-open-launch-app>中的extinfo数据
 

pubspec.yaml

 name: fluwx
 description: The capability of implementing WeChat SDKs in Flutter. With Fluwx, developers can use WeChatSDK easily, such as sharing, payment, lanuch mini program and etc.
-version: 2.5.0
+version: 2.6.0
 homepage: https://github.com/JarvanMo/fluwx
 
 environment: