bump to 4.4.7

CHANGELOG.md

+# 4.4.7
+* Response里asRecord更名为toRecord.
+* Response相关实体类的内容比较应该对比toRecord结果
+
 # 4.4.6
 * Response里asString更名为asRecord.
 

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: 4.4.6
+version: 4.4.7
 homepage: https://github.com/OpenFlutter/fluwx
 
 environment: