Update README_CN.md

Author: iwgang

README_CN.md

@@ -12,7 +12,7 @@ Android 倒计时控件，使用Canvas绘制，支持多种样式
 ![](https://raw.githubusercontent.com/iwgang/CountdownView/master/screenshot/screenshot.gif)  
 
 ### gradle
-    compile 'com.github.iwgang:countdownview:1.1.4'
+    compile 'com.github.iwgang:countdownview:1.2'
 
 ### code
 ```