Doc: Add CodeTriage badge (styleguidist#829)

Author: codetriage-readme-bot

Readme.md

@@ -5,6 +5,7 @@
 **Isolated React component development environment with a living style guide**
 
 [![Build Status](https://travis-ci.org/styleguidist/react-styleguidist.svg)](https://travis-ci.org/styleguidist/react-styleguidist) [![npm](https://img.shields.io/npm/v/react-styleguidist.svg)](https://www.npmjs.com/package/react-styleguidist) [![Join the chat at https://gitter.im/styleguidist/styleguidist](https://badges.gitter.im/styleguidist/styleguidist.svg)](https://gitter.im/styleguidist/styleguidist?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Join the community on Spectrum](https://withspectrum.github.io/badge/badge.svg)](https://spectrum.chat/styleguidist) [![Codecov](https://codecov.io/gh/styleguidist/react-styleguidist/branch/master/graph/badge.svg)](https://codecov.io/gh/styleguidist/react-styleguidist)
+[![Open Source Helpers](https://www.codetriage.com/styleguidist/react-styleguidist/badges/users.svg)](https://www.codetriage.com/styleguidist/react-styleguidist)
 
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