Add David dependencies badges

Author: tiagoschenkel

README.md

@@ -6,6 +6,8 @@ RobotlegsJS SignalCommandMap Extension
 [![Code Climate](https://codeclimate.com/github/GoodgameStudios/RobotlegsJS-SignalCommandMap/badges/gpa.svg)](https://codeclimate.com/github/GoodgameStudios/RobotlegsJS-SignalCommandMap)
 [![Test Coverage](https://codeclimate.com/github/GoodgameStudios/RobotlegsJS-SignalCommandMap/badges/coverage.svg)](https://codeclimate.com/github/GoodgameStudios/RobotlegsJS-SignalCommandMap/coverage)
 [![npm version](https://badge.fury.io/js/robotlegs-signalcommandmap.svg)](https://badge.fury.io/js/robotlegs-signalcommandmap)
+[![Dependency Status](https://img.shields.io/david/GoodgameStudios/RobotlegsJS-SignalCommandMap.svg?style=flat)](https://david-dm.org/GoodgameStudios/RobotlegsJS-SignalCommandMap)
+[![DevDependency Status](https://img.shields.io/david/dev/GoodgameStudios/RobotlegsJS-SignalCommandMap.svg?style=flat)](https://david-dm.org/GoodgameStudios/RobotlegsJS-SignalCommandMap?type=dev)
 
 [![NPM](https://nodei.co/npm/robotlegs-signalcommandmap.png?downloads=true&downloadRank=true)](https://nodei.co/npm/robotlegs-signalcommandmap/)
 [![NPM](https://nodei.co/npm-dl/robotlegs-signalcommandmap.png?months=9&height=3)](https://nodei.co/npm/robotlegs-signalcommandmap/)