Accept HighLevelWCS objects in WCSAxes fixes astropy/astropy#9529
Accept HighLevelWCS objects in WCSAxes fixes astropy/astropy#9529

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