README.md added gemnasium badge

Author: Slamdunk

README.md

@@ -2,6 +2,7 @@
 
 [![Build Status][ci-img]][ci]
 [![Latest version][npm-v-img]][npm]
+[![Dependency Status][gemnasium-img]][gemnasium]
 [![Downloads][npm-d-img]][npm]
 
 A plugin pack of stylehacks related linting rules for [stylelint].
@@ -97,5 +98,7 @@ allowed.
 [npm]: https://www.npmjs.com/package/stylelint-no-browser-hacks
 [npm-v-img]: https://img.shields.io/npm/v/stylelint-no-browser-hacks.svg
 [npm-d-img]: https://img.shields.io/npm/dt/stylelint-no-browser-hacks.svg
+[gemnasium-img]: https://gemnasium.com/badges/github.com/Slamdunk/stylelint-no-browser-hacks.svg
+[gemnasium]: https://gemnasium.com/github.com/Slamdunk/stylelint-no-browser-hacks
 [stylelint]: https://stylelint.io/
 [original-rule]: https://github.com/stylelint/stylelint/tree/7.8.0/lib/rules/no-browser-hacks