Added CI status to readme

Author: p-ranav

README.md

@@ -3,8 +3,8 @@
 </p>
 
 <p align="center">
-  <!-- <a href="https://travis-ci.com/p-ranav/cppgit2">
-    <img src="https://travis-ci.com/p-ranav/tabulate.svg?token=haZMYySrhmkE9vsJse61&branch=master" alt="ci status"/>
+  <a href="https://travis-ci.com/p-ranav/cppgit2">
+    <img src="https://api.travis-ci.com/p-ranav/cppgit2.svg?token=haZMYySrhmkE9vsJse61&branch=master" alt="ci status"/>
   </a> -->
   <a href="https://en.wikipedia.org/wiki/C%2B%2B11">
     <img src="https://img.shields.io/badge/C%2B%2B-11-blue.svg" alt="standard"/>