add codeconv badge

Author: appinteractive

README.md

@@ -5,10 +5,14 @@
 
 <p align="center">
   <a href="https://travis-ci.org/Human-Connection/API"><img src="https://img.shields.io/travis/Human-Connection/API/master.svg" alt="Build Status"></a>
+  <a href="https://codecov.io/gh/Human-Connection/API">
+  <img src="https://codecov.io/gh/Human-Connection/API/branch/develop/graph/badge.svg" />
+</a>
   <a href="https://github.com/Human-Connection/WebApp/blob/develop/LICENSE.md"><img src="https://img.shields.io/badge/license-MIT-green.svg" "MIT" /></a>
   <a href="https://app.fossa.io/projects/git%2Bgithub.com%2FHuman-Connection%2FAPI?ref=badge_shield" alt="FOSSA Status"><img src="https://app.fossa.io/api/projects/git%2Bgithub.com%2FHuman-Connection%2FAPI.svg?type=shield"/></a>
   <a href="https://discord.gg/NgVpvx9" alt="Discord Channel">
 <img src="https://img.shields.io/discord/443107904757694465.svg" alt="Discord" /></a>
+
 </p>
 
 # Human-Connection API