Update gemspec version, Rack 1.5.0
Update gemspec version, Rack 1.5.0

arronmabrey/rack,tricknotes/rack,supzann3/rack,fabianrbz/rack,rwz/rack,krainboltgreene/lack,fabianrbz/rack,imtayadeway/rack,eavgerinos/rack,gfvcastro/rack,trexnix/rack,davidcelis/rack,maclover7/rack,tylergannon/rack,ngpestelos/rack,AMekss/rack,evanphx/rack,stepri/rack,jackxxu/rack,arronmabrey/rack,chneukirchen/rack,wildjcrt/rack,davydovanton/rack,maclover7/rack,eins78/rack,gioele/rack,zjsxwc/rack,jackxxu/rack,liamseanbrady/rack,AMekss/rack,Codeman655/rack,laplaceliu/rack,eavgerinos/rack,keithduncan/rack,wjordan/rack,Eric-Guo/rack,fabianrbz/rack,jeremyf/rack,zjsxwc/rack,keepcosmos/rack,rwz/rack,eins78/rack,supzann3/rack,ganmacs/rack,Eric-Guo/rack,sigmavirus24/rack,evanphx/rack,jeremyf/rack,liamseanbrady/rack,Codeman655/rack,chneukirchen/rack,wjordan/rack,Eric-Guo/rack,keepcosmos/rack,sigmavirus24/rack,tylergannon/rack,ktheory/rack,Comcast/rack,maclover7/rack,gfvcastro/rack,chneukirchen/rack,deepj/rack,wildjcrt/rack,stepri/rack,evanphx/rack,sigmavirus24/rack,Codeman655/rack,Comcast/rack,shaneog/rack,rwz/rack,davydovanton/rack,davydovanton/rack,jeremyf/rack,imtayadeway/rack,Comcast/rack,keithduncan/rack,davidcelis/rack,supzann3/rack,ngpestelos/rack,akihiro17/rack,nmk/rack,tricknotes/rack,tylergannon/rack,liamseanbrady/rack,trexnix/rack,keepcosmos/rack,eavgerinos/rack,ktheory/rack,zjsxwc/rack,ganmacs/rack,shaneog/rack,AMekss/rack,imtayadeway/rack,stepri/rack,keithduncan/rack,shaneog/rack,jackxxu/rack,akihiro17/rack,ngpestelos/rack,arronmabrey/rack,nmk/rack,laplaceliu/rack,davidcelis/rack,deepj/rack,deepj/rack,gioele/rack,gfvcastro/rack,trexnix/rack,nmk/rack,wjordan/rack,laplaceliu/rack,akihiro17/rack,ganmacs/rack,wildjcrt/rack,eins78/rack,gioele/rack