Bump icalendar from 2.9.0 to 2.12.2

[dependabot]

Bumps icalendar from 2.9.0 to 2.12.2.

Changelog

Sourced from icalendar's changelog.

2.12.2 - 2026-03-21

• Fix a potential property injection issue through escaping control characters in URI values - Wes Ring

2.12.1 - 2025-10-19

• Fix a problem with invalid ics generation for calendars with custom properties that include a tzid parameter.

2.12.0 - 2025-09-26

• Support timezone lookup by Windows names - Ronak Gothi

2.11.2 - 2025-06-21

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

2.11.1 - 2025-06-06

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

2.11.0 - 2025-04-12

• Require gems for ruby 3.4 that used to be in stdlib - Go Sueyoshi
• Refactor how timezone offsets are calculated - Pat Allan
  • 'tzid' param is always returned as an array when accessing ical_params directly, rather than matching whatever the input parsed. ICS output remains unchanged

2.10.3 - 2024-09-21

• Override Icalendar::Value.== so that value objects can be compared to each other.
• Correctly load activesupport before activesupport/time
• Load ostruct to address deprecation warning - aki77

2.10.2 - 2024-07-21

• Raise Icalendar::Parser::ParseError on bad .ics file input instead of RuntimeError - Micah Geisel
• Remove Ruby 3.0 from the test matrix - still should work for now with ice_cube < 0.17.0
• Add Ruby 3.3 to the test matrix
• Move from old History.txt file to modern CHANGELOG.md - Guillaume Briday

2.10.1 - 2023-12-01

• Parsing now handles VTIMEZONE blocks defined after their TZID is used in events and other components

2.10.0 - 2023-11-01

• Add changelog metadata to gemspec - Juri Hahn
• Attempt to rescue timezone info when given a nonstandard tzid with no VTIMEZONE
• Move Values classes that shouldn't be directly used into Helpers module

Commits

• 7782ac1 Bump version to 2.12.2
• b8d23b4 Merge commit from fork
• 8115ffe Percent-encode ASCII control bytes in URI ICS serialization
• 0aa950a Bump version to 2.12.1
• f9778d3 Merge pull request #318 from icalendar/fix-tz-store
• 21379f4 Prevent surprises by not delegating all DowncasedHash methods to Hash
• c8c08f4 Pass timezone_store in the context instead of params
• a515e4d Add context to Icalendar::Value for information that should not be output dir...
• 5844e0a Create parser test for issue #317
• 57eda75 Bump version to 2.12.0
• Additional commits viewable in compare view

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