A version number, or change log, would also be a very welcome addition to the docs. There have been times when I was working on a v5 module that I had just stumbled on to a change that there had been no prior mention of, such as the addition of a new optional querystring parameter, which could have easily gone by unnoticed.
It would be nice to know when such things happen so if we try to maintain a twitch API module we can keep it as accurate to the docs as possible.