Restrict spec for invalid specs to >= 1.7
Restrict spec for invalid specs to >= 1.7

dilumnavanjana/bundler,cstrahan/bundler,danimashu/bundler,agis-/bundler,danimashu/bundler,h4ck3rm1k3/bundler,cdwort/bundler,asymmetric/bundler,cdwort/bundler,lmtim/bundler,ligi/bundler,elovelan/bundler,mattbrictson/bundler-1,anil826/bundler,ngpestelos/bundler,byroot/bundler,ximus/bundler,mpapis/bundler,frsyuki/bundler,seanlinsley/bundler,cstrahan/bundler,suhastech/bundler,chef/bundler,philnash/bundler,Wirachmat/bundler,byroot/bundler,asutoshpalai/bundler,h4ck3rm1k3/bundler,jingweno/bundler,carpodaster/bundler,nju520/bundler,Wirachmat/bundler,Eric-Guo/bundler,mvz/bundler,schaary/bundler,ngpestelos/bundler,kohgpat/bundler,lmtim/bundler,elovelan/bundler,jasonkarns/bundler,pivotal-cf-experimental/bundler,gregkare/bundler,bundler/bundler,ipmobiletech/bundler,joshsoftware/bundler,bundler/bundler,simplybusiness/bundler,asutoshpalai/bundler,mdorrance/bundler,masarakki/bundler,gregkare/bundler,davydovanton/bundler,Teino1978-Corp/Teino1978-Corp-bundler,tgxworld/bundler,steved/bundler,AiyionPrime/bundler,bronzdoc/bundler,chulkilee/bundler,kohgpat/bundler,ipmobiletech/bundler,carpodaster/bundler,PG-kura/bundler,dilumnavanjana/bundler,roseweixel/bundler,simplybusiness/bundler,roseweixel/bundler,EasonYi/bundler,wenderjean/bundler,mvz/bundler,nju520/bundler,EthanK28/bundler,steved/bundler,robinboening/bundler,christer155/bundler,neslom/bundler,masarakki/bundler,suhastech/bundler,Elffers/bundler,Teino1978-Corp/Teino1978-Corp-bundler,mpapis/bundler,EthanK28/bundler,jasonkarns/bundler,seanlinsley/bundler,wenderjean/bundler,EasonYi/bundler,zhangkuaiji/bundler,christer155/bundler,davydovanton/bundler,AiyionPrime/bundler,bronzdoc/bundler,robinboening/bundler,RochesterinNYC/bundler,tgxworld/bundler,anil826/bundler,chef/bundler,mdorrance/bundler,ligi/bundler,mattbrictson/bundler-1,Elffers/bundler,frsyuki/bundler,asymmetric/bundler,chulkilee/bundler,neslom/bundler,agis-/bundler,pivotal-cf-experimental/bundler,zhangkuaiji/bundler,philnash/bundler,jingweno/bundler,PG-kura/bundler,RochesterinNYC/bundler,joshsoftware/bundler,CorainChicago/bundler,ximus/bundler,Eric-Guo/bundler,CorainChicago/bundler,patvice/bundler,patvice/bundler,schaary/bundler