Add dependency badge

Author: garyb

README.md

@@ -2,6 +2,7 @@
 
 [![Latest release](http://img.shields.io/bower/v/purescript-js-timers.svg)](https://github.com/purescript-contrib/purescript-js-timers/releases)
 [![Build Status](https://travis-ci.org/purescript-contrib/purescript-js-timers.svg?branch=master)](https://travis-ci.org/purescript-contrib/purescript-js-timers)
+[![Dependency Status](https://www.versioneye.com/user/projects/5796030108356c003c23db10/badge.svg?style=flat)](https://www.versioneye.com/user/projects/5796030108356c003c23db10)
 [![Maintainer: garyb](https://img.shields.io/badge/maintainer-garyb-lightgrey.svg)](http://github.com/garyb)
 
 Low level bindings for JavaScript's timers API.