readme

@@ -6,6 +6,9 @@
  * @Description: Update log
  -->
 
+# 3.1.1
+- change readme
+
 # 3.1.0
 - Use the way back to v2 version
 - Modify registration method

@@ -13,11 +13,6 @@
 
 [Update log](https://github.com/OpenFlutter/flutter_screenutil/blob/master/CHANGELOG.md)
 
-## Note
-[v3](https://github.com/OpenFlutter/flutter_screenutil/tree/beta) requires `flutter >= 1.19.0`.
-
-[v2](https://github.com/OpenFlutter/flutter_screenutil) support all versions.
-
 ## Usage:
 
 ### Add dependency：

@@ -17,11 +17,6 @@
 
 [更新日志](https://github.com/OpenFlutter/flutter_screenutil/blob/master/CHANGELOG.md)
 
-## Note
-[v3](https://github.com/OpenFlutter/flutter_screenutil/tree/beta)可用于`flutter >= 1.19.0`
-
-[v2](https://github.com/OpenFlutter/flutter_screenutil)可用于所有版本。
-
 ## 使用方法:
 
 ### 安装依赖：

@@ -13,11 +13,6 @@
 
 [Histórico de atualizações](https://github.com/OpenFlutter/flutter_screenutil/blob/master/CHANGELOG.md)
 
-## Note
-[v3](https://github.com/OpenFlutter/flutter_screenutil/tree/beta) requer `flutter >= 1.19.0`.
-
-[v2](https://github.com/OpenFlutter/flutter_screenutil) support all versions.
-
 ## Como usar:
 
 ### Adicionando a dependência：

 name: flutter_screenutil
 description: A flutter plugin for adapting screen and font size.Guaranteed to look good on different models
-version: 3.1.0
+version: 3.1.1
 homepage: https://github.com/OpenFlutter/flutter_screenutil/tree/beta
 
 environment: