add nuxt-purgecss (#186)

README.md

@@ -113,7 +113,7 @@ Nuxt.js is a framework for creating Universal Vue.js Applications.
 A Nuxt module to automatically resize, rotate, blur, watermark and crop images.
 - [Nuxt-Storage](https://github.com/mazipan/nuxt-storage) - Utilities for easy read and write browser's storage in Nuxt.js project.
 - [nuxt-svg-loader](https://github.com/Developmint/nuxt-svg-loader) - Load your SVGs as you'd load your Vue components.
-
+- [nuxt-purgecss](https://github.com/Developmint/nuxt-purgecss) - Drop superfluous CSS!
 ### Tools
 
 - [nuxt-community/nuxt-generate-cluster](https://github.com/nuxt-community/nuxt-generate-cluster) - Multi-threaded generator command for nuxt.js.