BLD: Use statsmodels 0.4.3 for test scripts.
BLD: Use statsmodels 0.4.3 for test scripts.

0.5.0 is unavailable via the pep syntax, an incongruity
between the results of `pip install` and `pip freeze`

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