update ruby version in travis conf too
update ruby version in travis conf too

trinitronx/coderwall,pombredanne/coderwall,ggaabe/coderwall,AVGP/coderwall,ronaldotijucas/coderwall,alouanemed/coderwall,agileknight/coderwall,seuros/coderwall,assemblymade/coderwall,pombredanne/coderwall,pushkar-mishra/coderwall,wiserfirst/coderwall,wiserfirst/coderwall,coderwall/coderwall,ggaabe/coderwall,coderwall/coderwall,sekouzed/coderwall,ronaldotijucas/coderwall,sekouzed/coderwall,sekouzed/coderwall,alouanemed/coderwall,ggaabe/coderwall,DylanKojiCheslin/coderwall,seuros/coderwall,sekouzed/coderwall,ronaldotijucas/coderwall,frootloops/coderwall,DylanKojiCheslin/coderwall,pombredanne/coderwall,agileknight/coderwall,trinitronx/coderwall,frootloops/coderwall,ronaldotijucas/coderwall,DylanKojiCheslin/coderwall,trinitronx/coderwall,pushkar-mishra/coderwall,assemblymade/coderwall,coderwall/coderwall,coderwall/coderwall,AVGP/coderwall,santoshdeshpande/coderwall,seuros/coderwall,santoshdeshpande/coderwall,santoshdeshpande/coderwall,pushkar-mishra/coderwall,trinitronx/coderwall,pombredanne/coderwall,alouanemed/coderwall,frootloops/coderwall,AVGP/coderwall,seuros/coderwall,wiserfirst/coderwall,agileknight/coderwall,pushkar-mishra/coderwall,assemblymade/coderwall,agileknight/coderwall,alouanemed/coderwall,wiserfirst/coderwall,assemblymade/coderwall