Updated codecov status image

Author: hoshomoh

README.md

@@ -1,7 +1,5 @@
 [![Build Status](https://travis-ci.org/hoshomoh/CSVUtils.svg?branch=master)](https://travis-ci.org/hoshomoh/CSVUtils)
-<a href="https://codecov.io/gh/hoshomoh/CSVUtils">
-    <img src="https://codecov.io/gh/hoshomoh/CSVUtils/branch/master/graph/badge.svg" alt="Codecov" />
-</a>
+[![codecov](https://codecov.io/gh/hoshomoh/CSVUtils/branch/master/graph/badge.svg)](https://codecov.io/gh/hoshomoh/CSVUtils)
 
 # CSVUtils