`settings/rubygems.yml` has an API key in it

Just stumbled on this library and it looks cool. When browsing, I noticed that [settings/rubygems.yml](https://github.com/jfelchner/ruby-progressbar/blob/master/settings/rubygems.yml) has what appears to be an API key for ruby gems. I haven't looked to see how it's used but I wanted to make sure you were aware.