Merge pull request #576 from Tencent/dev

update readme for flutter

flutter/README.md

@@ -1,6 +1,6 @@
 [![license](https://img.shields.io/badge/license-BSD_3-brightgreen.svg?style=flat)](https://github.com/Tencent/MMKV/blob/master/LICENSE.TXT)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/Tencent/MMKV/pulls)
-[![Release Version](https://img.shields.io/badge/release-1.2.6-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
+[![Release Version](https://img.shields.io/badge/release-1.2.7-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
 [![Platform](https://img.shields.io/badge/Platform-%20Android%20%7C%20iOS-brightgreen.svg)](https://github.com/Tencent/MMKV/wiki/home)
 
 MMKV is an **efficient**, **small**, **easy-to-use** mobile key-value storage framework used in the WeChat application. It's currently available on **Android** and **iOS**.
@@ -26,11 +26,11 @@ Add the following lines to `pubspec.yaml` on your app module. Then run `flutter
 
 ```yaml
 dependencies:
-  mmkv: ">=1.2.6"
+  mmkv: ">=1.2.7"
   ...
 ```
 
-If you already include MMKV native lib in your App, you need to upgrade to version newer than v1.2.6.  
+If you already include MMKV native lib in your App, you need to upgrade to version newer than v1.2.7.  
 
 #### iOS  
 To avoid conflict of the native lib name 'libMMKV.so' on iOS, we need to **change the plugin name 'mmkv' to 'mmkvflutter'**.