CircleCI: updated docker images to include latest version of pytest-astropy and dependencies
CircleCI: updated docker images to include latest version of pytest-astropy and dependencies

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