textproc/py-zensical: Update to 0.0.56
Changelogs since 0.0.53:
https://github.com/zensical/zensical/releases/tag/v0.0.56
https://github.com/zensical/zensical/releases/tag/v0.0.55
https://github.com/zensical/zensical/releases/tag/v0.0.54
(cherry picked from commit 29050cc33cbf38a52b47283587feb3beccc6f5d0)