Add Node 4.2 to Travis
Add Node 4.2 to Travis

mietek/elm-webpack-loader,owanturist/elm-webpack-loader,rapind/elm-webpack-loader,owanturist/elm-webpack-loader,rtfeldman/elm-webpack-loader,mietek/elm-webpack-loader,rapind/elm-webpack-loader,rtfeldman/elm-webpack-loader