Use david-dm dependency badge

Author: conradz

README.md

@@ -3,7 +3,7 @@
 [![NPM](https://nodei.co/npm/rework-npm.png?compact=true)](https://nodei.co/npm/rework-npm/)
 
 [![Build Status](https://drone.io/github.com/conradz/rework-npm/status.png)](https://drone.io/github.com/conradz/rework-npm/latest)
-[![Dependency Status](https://gemnasium.com/conradz/rework-npm.png)](https://gemnasium.com/conradz/rework-npm)
+[![Dependency Status](https://david-dm.org/conradz/rework-npm.png)](https://david-dm.org/conradz/rework-npm)
 
 Import CSS styles from NPM modules using
 [rework](https://github.com/visionmedia/rework).