This is more of a question than an actual issue - is there any special reason the last version of the gem was released more than a year ago?
This is the problem I had - The option "except" wasn't working. I looked into the code at github and it made perfect sense, but when I looked at the installed gem code I saw it didn't have this pull request: #100, because the gem was last released before that.
This is an invalid issue. That said, there have been multiple issues since you asked this.
Thanks for raising it!