Unpin pytest in CircleCI 32-bit [skip travis]
Unpin pytest in CircleCI 32-bit [skip travis]

saimn/astropy,StuartLittlefair/astropy,pllim/astropy,astropy/astropy,astropy/astropy,larrybradley/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,stargaser/astropy,dhomeier/astropy,mhvk/astropy,stargaser/astropy,lpsinger/astropy,pllim/astropy,StuartLittlefair/astropy,pllim/astropy,astropy/astropy,saimn/astropy,larrybradley/astropy,lpsinger/astropy,lpsinger/astropy,stargaser/astropy,larrybradley/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,mhvk/astropy,StuartLittlefair/astropy,astropy/astropy,larrybradley/astropy,StuartLittlefair/astropy,pllim/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,mhvk/astropy,astropy/astropy,saimn/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,mhvk/astropy,lpsinger/astropy,stargaser/astropy,dhomeier/astropy,MSeifert04/astropy,saimn/astropy,saimn/astropy,pllim/astropy,MSeifert04/astropy,StuartLittlefair/astropy,dhomeier/astropy,mhvk/astropy