Add v3.0.2 and v2.0.6 to the changelog [skip ci]
Add v3.0.2 and v2.0.6 to the changelog [skip ci]

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