update readme

Author: CarGuo

README.md

@@ -84,7 +84,7 @@
 
 ## 编译运行流程
 
-1、配置好Flutter开发环境(目前Flutter SDK 版本 **1.7.8**)，可参阅 [【搭建环境】](https://flutterchina.club)。
+1、配置好Flutter开发环境(目前Flutter SDK 版本 **1.9.1**)，可参阅 [【搭建环境】](https://flutterchina.club)。
 
 2、clone代码，执行`Packages get`安装第三方包。(因为某些不可抗力原因，国内可能需要设置代理: [代理环境变量](https://flutterchina.club/setup-windows/))
 
@@ -106,7 +106,7 @@
 
 4、运行之前请注意下
 
->### 1、本地Flutter SDK 版本 1.7.8 以上。2、pubspec.yaml 中的第三方包版本和 pubspec.lock 中的是否对应的上
+>### 1、本地Flutter SDK 版本 1.9.1 以上。2、pubspec.yaml 中的第三方包版本和 pubspec.lock 中的是否对应的上
 
 
 ## 项目结构图
@@ -149,7 +149,7 @@
 
 ### 第三方框架
 
->当前 Flutter SDK 版本  1.7.8
+>当前 Flutter SDK 版本  1.9.1
 
 | 库                          | 功能             |
 | -------------------------- | -------------- |

README_EN.md

@@ -56,7 +56,7 @@ With the use and feedback of the project, will user experience and function opti
 
 ### Operation instructions
 
-1. Configure the Flutter development environment (Tag of the current version of Flutter SDK  **1.7.8** ).
+1. Configure the Flutter development environment (Tag of the current version of Flutter SDK  **1.9.1** ).
 
 2. Clone code, execute `Packages get'to install third-party packages.
 
@@ -79,7 +79,7 @@ With the use and feedback of the project, will user experience and function opti
 
 4、Be careful
 
->### Local Flutter SDK version  1.7.8 or more. 2. Does the third-party package version in pubspec. yaml correspond to the third-party package version in pubspec. lock?
+>### Local Flutter SDK version  1.9.1 or more. 2. Does the third-party package version in pubspec. yaml correspond to the third-party package version in pubspec. lock?
 
 
 ## Project Structure
@@ -116,7 +116,7 @@ With the use and feedback of the project, will user experience and function opti
 
 ### Third-party framework
 
->Current Flutter SDK version **1.7.8**
+>Current Flutter SDK version **1.9.1**
 
 | 库                          | 功能             |
 | -------------------------- | -------------- |