MAINT: Upgrade Cython to 0.22.1
MAINT: Upgrade Cython to 0.22.1

alphaBenj/zipline,joequant/zipline,jimgoo/zipline-fork,ronalcc/zipline,cmorgan/zipline,humdings/zipline,joequant/zipline,michaeljohnbennett/zipline,nborggren/zipline,chrjxj/zipline,iamkingmaker/zipline,AlirezaShahabi/zipline,enigmampc/catalyst,aajtodd/zipline,nborggren/zipline,alphaBenj/zipline,DVegaCapital/zipline,keir-rex/zipline,iamkingmaker/zipline,wilsonkichoi/zipline,umuzungu/zipline,Scapogo/zipline,dmitriz/zipline,quantopian/zipline,wubr2000/zipline,gwulfs/zipline,cmorgan/zipline,jimgoo/zipline-fork,YuepengGuo/zipline,ChinaQuants/zipline,zhoulingjun/zipline,YuepengGuo/zipline,umuzungu/zipline,sketchytechky/zipline,magne-max/zipline-ja,magne-max/zipline-ja,wilsonkichoi/zipline,ronalcc/zipline,michaeljohnbennett/zipline,dkushner/zipline,sketchytechky/zipline,DVegaCapital/zipline,quantopian/zipline,dmitriz/zipline,euri10/zipline,otmaneJai/Zipline,CDSFinance/zipline,keir-rex/zipline,dkushner/zipline,florentchandelier/zipline,bartosh/zipline,kmather73/zipline,AlirezaShahabi/zipline,ChinaQuants/zipline,otmaneJai/Zipline,jordancheah/zipline,MonoCloud/zipline,humdings/zipline,semio/zipline,kmather73/zipline,enigmampc/catalyst,morrisonwudi/zipline,Scapogo/zipline,MonoCloud/zipline,grundgruen/zipline,jordancheah/zipline,gwulfs/zipline,morrisonwudi/zipline,CDSFinance/zipline,bartosh/zipline,grundgruen/zipline,florentchandelier/zipline,chrjxj/zipline,wubr2000/zipline,zhoulingjun/zipline,aajtodd/zipline,semio/zipline,euri10/zipline