🐛 Bug: contributors should be recommendation as opposed to warning?

[danielbayley]

Many projects don’t have any contributors other than the package author, so maybe either this should be a recommendation, or possibly even some kind of git check of [if] the number of contributors [> 1]… something like:

(($(git shortlog -s | wc -l) > 1))

[JoshuaKGoldberg]

I think we can remove the warning about contributors altogether. It's common for packages to have just one author. In an ideal world, every package would have multiple people responsible for it... but in practice, that's not feasible much of the time.

Note that per #78 I'm still ramping up on this project. I'm going to mark this as status: blocked for a little while to get through less break-ing-change-y changes. But then once we're ready for a new major, this should be a nice straightforward win. Cheers! 🧡