update README.md

README.md

@@ -4,8 +4,8 @@
   </a>
 </p>
 # NutUI
-[![version](https://img.shields.io/badge/version-1.0-blue.svg)](http://nutui.jd.com/)
-[![license](https://img.shields.io/badge/license-MIT-yellow.svg)](http://nutui.jd.com/)
+[![version](https://img.shields.io/badge/version-1.0-blue.svg?style=flat-square)](http://nutui.jd.com/)
+[![license](https://img.shields.io/badge/license-MIT-yellow.svg?style=flat-square)](http://nutui.jd.com/)
 
 > 基于Vue 2.0的移动端轻量级UI组件库