updated travis to latest minor rails versions
updated travis to latest minor rails versions

substancelab/route_downcaser,carstengehling/route_downcaser,marleyspoon/route_downcaser,marleyspoon/route_downcaser,substancelab/route_downcaser,marleyspoon/route_downcaser,carstengehling/route_downcaser,substancelab/route_downcaser,carstengehling/route_downcaser