Add changelog for deprecations
Add changelog for deprecations

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