Add v2.0.2 to the changelog
Add v2.0.2 to the changelog

bsipocz/astropy-helpers,astropy/astropy-helpers,bsipocz/astropy-helpers,astropy/astropy-helpers,bsipocz/astropy-helpers,Cadair/astropy-helpers,Cadair/astropy-helpers,dpshelio/astropy-helpers,dpshelio/astropy-helpers