Wrong pin

[xeor]

At https://github.com/jazzband/icalevents/blob/v0.1.29/pyproject.toml#L12, icalendar is hard-pinned to "5.0.13".
Is there any specific reason for this? It causes some issues downstream, eg in home-assistant/core#134649

Not this libs fault directly, but, in the example above

• Home-assistant uses a new version of icalendar, and is installed using that
• hacs (a home-assistant framework for installing custom stuff), has a module, in this case for waste-bin-schedules that depends on icalevents
• Since the module from hacs installs after home-assistant, it replaces the installed new version of icalendar with version 5.0.13
• Some home-assistant integrations fails that depends on the new icalendar that is not available anymore.

[xi]

Duplicate of #123 (which was closed without a real fix)