ANN: commonmark 0.30

Version 0.30 of the CommonMark spec has been released:

I have also released conforming versions of the reference implementations

Most of the changes to the spec are fairly minor, fiddly things, and I suspect conforming implementations won’t need many changes to get up to date. See the changelog for details.

Thanks to everyone who contributed, and especially Titus Wormer, who made many improvements to the spec.