Update readme

Author: adamwathan

README.md

@@ -8,6 +8,7 @@ Please note that these examples are for the most part contributed and maintained
 
 - [vue-cli](examples/vue-cli)
 - [Nuxt.js](examples/nuxt)
+- [Next.js](examples/nextjs)
 - [Svelte](examples/svelte)
 - [Sapper](examples/sapper)
 - [Laravel](examples/laravel-postcss-only) (PostCSS-only)