Bump version of Nokogiri to 1.5.3 minimum.
Bump version of Nokogiri to 1.5.3 minimum.

tas50/foodcritic,offslinker/foodcritic,coderanger/foodcritic,acrmp/foodcritic,akihiro17/foodcritic,pkang/foodcritic,docwhat/foodcritic,nathenharvey/foodcritic,Foodcritic/foodcritic,chazzly/foodcritic,askl56/foodcritic,odcinek/foodcritic,clintoncwolfe/foodcritic