Package to v3.1.1

[lyzadanger]

Version the package.

This started as a version-bump to 3.1.0, but a typo in the CHANGELOG led to 3.1.1 because the 3.0.0 tag had already been pushed.

[robertknight]

LGTM. In general I feel that straightforward package updates like this (ie. version bump + CHANGELOG update) do not require review, although feel free to request one if you want input on something specific.

[lyzadanger]

In general I feel that straightforward package updates like this (ie. version bump + CHANGELOG update) do not require review

I tend to agree, especially from a PITA perspective: any requested changes here would end up with a new commit hash, which would in turn muck up the tag that has already been pushed at this point. Let's discuss in our next team chat.