Move description in changelog to 0.4.2 [skip ci]
Move description in changelog to 0.4.2 [skip ci]

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