removing stylus from readme

Author: sergiokopplin

README.md

@@ -26,7 +26,7 @@
 
 ## What has inside?
 
-- [Gulp](http://gulpjs.com/), [BrowserSync](https://www.browsersync.io/), [Stylus](http://stylus-lang.com/) ~[RSCSS](http://rscss.io/)~ and [SVG](https://www.w3.org/Graphics/SVG/)
+- [Gulp](http://gulpjs.com/), [BrowserSync](https://www.browsersync.io/), [Sass](http://sass-lang.com/) ~[RSCSS](http://rscss.io/)~ and [SVG](https://www.w3.org/Graphics/SVG/)
 - Tests with [Travis](https://travis-ci.org/)
 - Google Speed: [98/100](https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fsergiokopplin.github.io%2Findigo%2F)
 - No JS. :sunglasses: