Bump icalendar from 4.0.9 to 7.1.2 in /requirements

[dependabot]

Bumps icalendar from 4.0.9 to 7.1.2.

Release notes

Sourced from icalendar's releases.

v7.1.2

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v7.1.1

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v7.1.0

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v7.0.3

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v7.0.2

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v7.0.1

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v7.0.0

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v7.0.0a3

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v7.0.0a2

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v7.0.0a1

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v6.3.2

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v6.3.1

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v6.3.0

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v6.2.0

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v6.1.3

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v6.1.2

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v6.1.1

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Changelog

Sourced from icalendar's changelog.

7.1.2 (2026-05-22)

Bug fixes

- Replaced the recursive :meth:`Component.__repr__ <icalendar.cal.component.Component.__repr__>` implementation with an iterative stack-based walk so that deeply nested calendars no longer raise :exc:`RecursionError` when formatted via ``repr()``, ``str()``, or f-strings. The output format is unchanged for normally-shaped calendars. @gistrec (`Issue [#1370](https://github.com/collective/icalendar/issues/1370) <https://github.com/collective/icalendar/issues/1370>`_)
Documentation

• Update maintenance documentation. Fix the version switcher on "stable" on Read the Docs. @​stevepiercy (Issue [#1352](https://github.com/collective/icalendar/issues/1352) <https://github.com/collective/icalendar/issues/1352>_)

7.1.1 (2026-05-18)

New features

- Created an :attr:`~icalendar.prop.dt.period.vPeriod.ical_value` property for the :class:`~icalendar.prop.dt.period.vPeriod` component. @ZairKSM (`Issue [#876](https://github.com/collective/icalendar/issues/876) <https://github.com/collective/icalendar/issues/876>`_)
- Created a :meth:`~icalendar.prop.recur.weekday.vWeekday.ical_value` property for the :class:`~icalendar.prop.recur.weekday.vWeekday` component, mirroring the existing pattern on :class:`~icalendar.prop.boolean.vBoolean`. @mvanhorn (`Issue [#1360](https://github.com/collective/icalendar/issues/1360) <https://github.com/collective/icalendar/issues/1360>`_)
Bug fixes

- Strictly validate BINARY property values in :attr:`vBinary.from_ical() &lt;icalendar.prop.binary.vBinary.from_ical&gt;` and reject malformed Base64 input instead of silently accepting invalid characters. @uwezkhan (`Issue [#1349](https://github.com/collective/icalendar/issues/1349) &lt;https://github.com/collective/icalendar/issues/1349&gt;`_)
Documentation

</code></pre>

<ul>

<li>Replace the RFC quotations in the docstrings for :attr:<code>Alarm.REPEAT &lt;icalendar.cal.alarm.Alarm.REPEAT&gt;</code> and :attr:<code>Alarm.DURATION &lt;icalendar.cal.alarm.Alarm.DURATION&gt;</code> with Pythonic descriptions, including parameter notes, conformance references, and worked examples. <a href="https://github.com/tmchow&quot;&gt;&lt;code&gt;@​tmchow&lt;/code&gt;&lt;/a> (<code>Issue #1244 &lt;collective/icalendar#1244>

<li>Edited contributor documentation for how to add a change log entry, and maintenance documentation for how to process news fragments. <a href="https://github.com/stevepiercy&quot;&gt;&lt;code&gt;@​stevepiercy&lt;/code&gt;&lt;/a> (<code>Issue #1256 &lt;collective/icalendar#1256>

<li>Updated release process documentation. <a href="https://github.com/niccokunzmann&quot;&gt;&lt;code&gt;@​niccokunzmann&lt;/code&gt;&lt;/a> <a href="https://github.com/stevepiercy&quot;&gt;&lt;code&gt;@​stevepiercy&lt;/code&gt;&lt;/a> <a href="https://github.com/SashankBhamidi&quot;&gt;&lt;code&gt;@​SashankBhamidi&lt;/code&gt;&lt;/a> (<code>Issue #1293 &lt;collective/icalendar#1293>

</ul>

<p>Dependency changes</p>

<pre><code>

Added towncrier &amp;lt;https://pypi.org/project/towncrier/&amp;gt;_ to development dependencies. @stevepiercy (Issue [#1256](https://github.com/collective/icalendar/issues/1256) &amp;lt;https://github.com/collective/icalendar/issues/1256&amp;gt;_)

Internal changes



Switched from manual change log management to towncrier &lt;https://pypi.org/project/towncrier/&gt;_ to automate the process. @​stevepiercy (Issue [#1256](https://github.com/collective/icalendar/issues/1256) &lt;https://github.com/collective/icalendar/issues/1256&gt;_)
Bump PyPy from 3.10 to 3.11 for testing. @​stevepiercy (Issue [#1383](https://github.com/collective/icalendar/issues/1383) &lt;https://github.com/collective/icalendar/issues/1383&gt;_)
</tr></table>

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Commits

• f5494e3 Merge branch 'main' into 7.x
• 6ddbd95 version 7.1.2
• 6efe639 Update maintenance docs and fix version switcher for "stable" (#1393)
• 67d6ab9 Fix RecursionError in Component.repr on deeply nested calendars (Closes #...
• 8705729 Restore version warning banner for 'latest' on Read the Docs
• 8fccb3a Update version switcher for 7.1.1
• 79ddc3e Merge branch 'main' into 7.x
• 465936b version 7.1.1
• 39b8db8 Update release process (#1350)
• c343662 Switch to towncrier to automatically manage the change log (#1389)
• Additional commits viewable in compare view