Update README.md

Author: njleonzhang

README.md

@@ -1,7 +1,9 @@
 <p align="center"><a href="" target="_blank"><img width="100"src="https://njleonzhang.github.io/vue-data-tables/_media/icon.svg"></a></p>
 
 <p align="center">
-  <a href="https://github.com/njleonzhang/vue-data-tables"><img src="https://travis-ci.org/njleonzhang/vue-data-tables.svg?branch=master" alt="Build Status"></a>
+  <a href="https://github.com/njleonzhang/vue-data-tables" target="_blank"><img src="https://travis-ci.org/njleonzhang/vue-data-tables.svg?branch=master" alt="Build Status"></a>
+  <a href='https://coveralls.io/github/njleonzhang/vue-data-tables?branch=master' target="_blank"><img src='https://coveralls.io/repos/github/njleonzhang/vue-data-tables/badge.svg?branch=master' alt='Coverage Status' /></a>
+  <a href='https://www.npmjs.com/package/vue-data-tables' target="_blank"><img src='https://img.shields.io/npm/v/vue-data-tables.svg' alt='Node' /></a>
 </p>
 
 ## Documentation