Update python-dateutil to 2.9.0.post0

[pyup-bot]

This PR updates python-dateutil from 2.8.2 to 2.9.0.post0.

Changelog

2.9.0.post0

================================

Bugfixes
--------

- Pinned ``setuptools_scm`` to ``<8``, which should make the generated ``_version.py`` file compatible with all supported versions of Python.

2.9.0

==========================

Data updates
------------

- Updated tzdata version to 2024a. (gh pr 1342)


Features
--------

- Made all ``dateutil`` submodules lazily imported using `PEP 562
<https://www.python.org/dev/peps/pep-0562/>`_. On Python 3.7+, things like
``import dateutil; dateutil.tz.gettz("America/New_York")`` will now work
without explicitly importing ``dateutil.tz``, with the import occurring behind
the scenes on first use. The old behavior remains on Python 3.6 and earlier.
Fixed by Orson Adams. (gh issue 771, gh pr 1007)


Bugfixes
--------

- Removed a call to ``datetime.utcfromtimestamp``, which is deprecated as of Python 3.12. Reported by Hugo van Kemenade (gh pr 1284), fixed by Thomas Grainger (gh pr 1285).


Documentation changes
---------------------

- Added note into docs and tests where relativedelta would return last day of the month
only if the same day on a different month resolves to a date that doesn't exist.
Reported by hawkEye-01 (gh issue 1167). Fixed by Mifrill (gh pr 1168)

Links

• PyPI: https://pypi.org/project/python-dateutil
• Changelog: https://data.safetycli.com/changelogs/python-dateutil/
• Repo: https://github.com/dateutil/dateutil