Add .pytest_cache to .gitignore
Add .pytest_cache to .gitignore

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