Update changelog with abstract models.
Update changelog with abstract models.

voormedia/rails-erd,mallikarjunayaddala/rails-erd,kerrizor/rails-erd,kerrizor/rails-erd,voormedia/rails-erd,qiujuer/rails-erd,sferik/rails-erd,nalabjp/rails-erd,sferik/rails-erd,mallikarjunayaddala/rails-erd,nalabjp/rails-erd,qiujuer/rails-erd