Update rouge gem
Update rouge gem

There have been some quite satisfying improvements in rouge.
Since there are no breaking changes and this line blocks gitlab from 
updating the gem, let's bump the version!

Changelog: https://github.com/jneen/rouge/blob/master/CHANGELOG.md
doordash/gollum-lib,bpieck/gollum-lib,repotag/gollum-lib,flozzone/gollum-lib,repotag/gollum-lib,rgroux/gollum-lib,kwoods/gollum-lib,mchill/gollum-lib,rgroux/gollum-lib,assilzm/gollum-lib,bpieck/gollum-lib,Komodo/gollum-lib,gitcafe-dev/gollum-lib,gitcafe-dev/gollum-lib,gollum/gollum-lib,Komodo/gollum-lib,kwoods/gollum-lib,jhominal/gollum-lib,jhominal/gollum-lib,assilzm/gollum-lib,doordash/gollum-lib,gollum/gollum-lib,flozzone/gollum-lib,mchill/gollum-lib