New: Add dev dependency david badge to README (#9058)

README.md

@@ -7,7 +7,8 @@
 [![Rocket.Chat](https://open.rocket.chat/images/join-chat.svg)](https://open.rocket.chat/)
 [![Build Status](https://img.shields.io/travis/RocketChat/Rocket.Chat/master.svg)](https://travis-ci.org/RocketChat/Rocket.Chat)
 [![Project Dependencies](https://david-dm.org/RocketChat/Rocket.Chat.svg)](https://david-dm.org/RocketChat/Rocket.Chat)
-[![Codacy Badge](https://api.codacy.com/project/badge/grade/8580571ba024426d9649e9ab389bd5dd)](https://www.codacy.com/app/RocketChat/Rocket-Chat)
+[![devDependencies Status](https://david-dm.org/RocketChat/Rocket.Chat/dev-status.svg)](https://david-dm.org/RocketChat/Rocket.Chat?type=dev)
+[![Codacy Badge](https://api.codacy.com/project/badge/grade/8580571ba024426d9649e9ab389bd5dd)](https://www.codacy.com/app/RocketChat/Rocket-chat)
 [![Coverage Status](https://coveralls.io/repos/RocketChat/Rocket.Chat/badge.svg)](https://coveralls.io/r/RocketChat/Rocket.Chat)
 [![Code Climate](https://codeclimate.com/github/RocketChat/Rocket.Chat/badges/gpa.svg)](https://codeclimate.com/github/RocketChat/Rocket.Chat)
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)](https://github.com/RocketChat/Rocket.Chat/raw/master/LICENSE)