fix(deps): update dependency icalendar to v7.0.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
icalendar (changelog)	==7.0.0 → ==7.0.3

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Release Notes

collective/icalendar (icalendar)

v7.0.3

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Minor changes

- Show colorful required code changes in the CI output to help contributors solve the formatting issues. :pr:`1216`
- Use ruff 0.15.0 for code formatting in :file:`tox.ini`. :pr:`1215`

New features
~~~~~~~~~~~~

- Added :attr:`Event.RECURRENCE_ID <icalendar.cal.event.Event.RECURRENCE_ID>`,
  :attr:`Todo.RECURRENCE_ID <icalendar.cal.todo.Todo.RECURRENCE_ID>` and
  :attr:`Journal.RECURRENCE_ID <icalendar.cal.journal.Journal.RECURRENCE_ID>`
  properties, including support in their ``new()`` constructors. :issue:`1231`

Bug fixes
~~~~~~~~~

- Fixed :func:`~icalendar.timezone.tzid.tzids_from_tzinfo` not recognizing
  ``dateutil.tz.win.tzwin`` objects on Windows. UTC datetimes using
  ``dateutil.tz.gettz("UTC")`` now correctly serialize with the ``Z`` suffix
  instead of ``TZID=Coordinated Universal Time``. :issue:`1056`
- Fixed :meth:`Calendar.get_missing_tzids <icalendar.cal.calendar.Calendar.get_missing_tzids>`
  raising ``KeyError`` when a VTIMEZONE exists for a timezone not referenced by any event TZID,
  for example, when added by the ``x-wr-timezone`` conversion. :issue:`1124`
- Fixed :meth:`Calendar.get_missing_tzids <icalendar.cal.calendar.Calendar.get_missing_tzids>`
  and :meth:`Calendar.add_missing_timezones <icalendar.cal.calendar.Calendar.add_missing_timezones>`
  generating a spurious ``VTIMEZONE`` for UTC. :rfc:`5545#section-3.2.19` requires UTC datetimes
  to use the ``Z`` suffix; no ``VTIMEZONE`` component is needed or permitted. :issue:`1124`
- Fixed :meth:`Parameters.update_tzid_from <icalendar.parser.parameter.Parameters.update_tzid_from>`
  incorrectly setting ``TZID=UTC`` on UTC datetimes. :rfc:`5545#section-3.2.19` requires UTC datetimes to
  use the ``Z`` suffix without a ``TZID`` parameter. :issue:`1124`
- Renamed the public functions ``escape_char`` and ``unescape_char`` to implicit private methods ``_escape_char`` and ``_unescape_char``.
  Fixed regression from :issue:`1008` by restoring :func:`~icalendar.parser.string.escape_char` and :func:`~icalendar.parser.string.unescape_char` as public functions.
  The public functions :func:`~icalendar.parser.string.escape_char` and :func:`~icalendar.parser.string.unescape_char` are now deprecated with warnings for external users.
  :pr:`1241`.

Documentation

• Add icalendar as a local workspace dependency to the docs dependency group in :file:pyproject.toml to fix dependency resolution issues with uv lock during documentation builds. :issue:1253 :pr:1254
• Use sphinx-icalendar to add syntax highlighting to iCalendar text

v7.0.2

Compare Source

Minor changes

- Show required code changes in the CI output to help contributors solve the formatting issues. :pr:`1216`
- Use ruff 0.15.0 for code formatting in :file:`tox.ini`. :pr:`1215`

New features
~~~~~~~~~~~~

- Enabled :meth:`Calendar.from_ical <icalendar.cal.calendar.Calendar.from_ical>` to read calendars from files. :issue:`756`
- Added :attr:`Calendar.journals <icalendar.cal.calendar.Calendar.journals>` property to retrieve all journal components. :issue:`1230`

Documentation

• Removed methods of str, int, and other classes and methods in the Python standard library from the documentation.

v7.0.1

Compare Source

Minor changes

- Setting :attr:`~cal.calendar.Calendar.calendar_name` now also writes ``X-WR-CALNAME``, and setting :attr:`~cal.calendar.Calendar.description` now also writes ``X-WR-CALDESC``, for improved client compatibility. :issue:`918`

Bug fixes
~~~~~~~~~

- Make ``typing_extensions`` a dependency. :issue:`1202`

Documentation

• Fixed the version switcher on Read the Docs, and documented the process for a major release. :issue:1194
• Added usage examples for reading calendars from files and URL. :issue:756
• Add type hints and convert docstrings to Google Style in :file:cli.py. :issue:938

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