- add syntax definitions for `@apply` and `config()`:
**Before:**
<imgsrc="https://user-images.githubusercontent.com/2615508/44740655-ed02ee80-aaf2-11e8-8d3e-1075e0801fd7.png"alt="Syntax highlighting before update"width="345"/>
**After:**
<imgsrc="https://user-images.githubusercontent.com/2615508/44740606-cba20280-aaf2-11e8-92b8-42adbfe54c61.png"alt="Syntax highlighting after update"width="345"/>