Use same Rubocop version as HoundCI (#1752)
Use same Rubocop version as HoundCI (#1752)

http://help.houndci.com/en/articles/2137566-rubocop
robinboening/alchemy_cms,mamhoff/alchemy_cms,AlchemyCMS/alchemy_cms,AlchemyCMS/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,robinboening/alchemy_cms,mamhoff/alchemy_cms,mamhoff/alchemy_cms