ANN: pandoc 3.1.1

[John MacFarlane]

I'm pleased to announce the release of pandoc 3.1.1,
available in the usual places:

Binary packages & changelog:
https://github.com/jgm/pandoc/releases/tag/3.1.1

Source & API documentation:
http://hackage.haskell.org/package/pandoc-3.1.1

Mostly this is a bugfix release. There are two changes to the
Lua API:

- New function pandoc.system.cputime
- New module pandoc.json for JSON conversion

Thanks to all who contributed, especially new contributors
Mikołaj Machowski, Morgan Willcock, Pavol Otto, and arcnmx.