chore(deps): update dependency icalendar to v2.11.2

This MR contains the following updates:

Package	Update	Change
icalendar (changelog)	patch	2.11.0 -> 2.11.2

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Release Notes

icalendar/icalendar (icalendar)

v2.11.2

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• Deal with more bad value parameter values by falling back to the property default type

v2.11.1

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• Gracefully deal with malformed ics files that use spaces in the value parameter instead of hyphens

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