Log Message:
py-icalendar: update to 5.0.12.

5.0.12 (2024-03-19)
-------------------

Minor changes:

- Added corpus to fuzzing directory
- Added exclusion of fuzzing corpus in MANIFEST.in
- Augmented fuzzer to optionally convert multiple calendars from a source string
- Add script to convert OSS FUZZ test cases to Python/pytest test cases
- Added additional exception handling of defined errors to fuzzer, to allow \ 
fuzzer to explore deeper
- Added more instrumentation to fuzz-harness
- Rename "contributor" to "collaborator" in documentation
- Correct the outdated "icalendar view myfile.ics" command in \ 
documentation. #588
- Update GitHub Actions steps versions
- Keep GitHub Actions up to date with GitHub's Dependabot

Bug fixes:

- ...
- Fixed index error in cal.py when attempting to pop from an empty stack
- Fixed type error in prop.py when attempting to join strings into a byte-string
- Caught Wrong Date Format in ical_fuzzer to resolve fuzzing coverage blocker