Regenerate gemspec for version 0.4.5
Regenerate gemspec for version 0.4.5

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