TST: Run apt update on CircleCI
TST: Run apt update on CircleCI

saimn/astropy,StuartLittlefair/astropy,larrybradley/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,larrybradley/astropy,lpsinger/astropy,mhvk/astropy,mhvk/astropy,pllim/astropy,astropy/astropy,pllim/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,lpsinger/astropy,lpsinger/astropy,astropy/astropy,saimn/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,astropy/astropy,pllim/astropy,mhvk/astropy,lpsinger/astropy,pllim/astropy,saimn/astropy,astropy/astropy,saimn/astropy,mhvk/astropy,larrybradley/astropy,mhvk/astropy,lpsinger/astropy,saimn/astropy,pllim/astropy