bump to 5.2.6

CHANGELOG.md

+# 5.2.6
+* iOS脚本优化
+
 # 5.2.5
 * 测试自动发布脚本
 

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: 5.2.5
+version: 5.2.6
 homepage: https://github.com/OpenFlutter/fluwx
 
 environment: