chore(package): update grunt-contrib-csslint to version 2.0.0
chore(package): update grunt-contrib-csslint to version 2.0.0

https://greenkeeper.io/
mozilla/srihash.org,jonathanKingston/srihash.org,jonathanKingston/srihash.org,mozilla/srihash.org,jonathanKingston/srihash.org