Update travis setup
Update travis setup

mpeterv/luacheck,xpol/luacheck,kidaa/luacheck,xpol/luacheck,adan830/luacheck,tst2005/luacheck,mpeterv/luacheck,mpeterv/luacheck,kidaa/luacheck,linuxmaniac/luacheck,xpol/luacheck,tst2005/luacheck,linuxmaniac/luacheck,adan830/luacheck