0.12.1

This release adds support for the graphics routines in Purr Data (requires agraef/purr-data@3b8bdbc).

This will be the version included in Purr Data in an upcoming release, and is already included in the latest builds available at https://github.com/agraef/purr-data/actions and the OBS. Note that if you're already running pd-lua 0.12.0 in vanilla Pd or plugdata, there's no need to upgrade, as apart from the Purr Data support in the source code there are no functional changes.