fix(deps): Update dependency python-dateutil to v2.9.0.post0 (#167)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [python-dateutil](https://togithub.com/dateutil/dateutil) | minor | `==2.8.2` -> `==2.9.0.post0` |

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### Release Notes

<details>
<summary>dateutil/dateutil (python-dateutil)</summary>

### [`v2.9.0.post0`](https://togithub.com/dateutil/dateutil/releases/tag/2.9.0.post0)

[Compare Source](https://togithub.com/dateutil/dateutil/compare/2.9.0...2.9.0.post0)

### Version 2.9.0.post0 (2024-03-01)

#### Bugfixes

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

### [`v2.9.0`](https://togithub.com/dateutil/dateutil/releases/tag/2.9.0)

[Compare Source](https://togithub.com/dateutil/dateutil/compare/2.8.2...2.9.0)

### Version 2.9.0 (2024-02-29)

#### Data updates

-   Updated tzdata version to 2024a. (gh pr [#&#8203;1342](https://togithub.com/dateutil/dateutil/issues/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 [#&#8203;771](https://togithub.com/dateutil/dateutil/issues/771), gh pr [#&#8203;1007](https://togithub.com/dateutil/dateutil/issues/1007))

#### Bugfixes

-   Removed a call to `datetime.utcfromtimestamp`, which is deprecated as of Python 3.12. Reported by Hugo van Kemenade (gh pr [#&#8203;1284](https://togithub.com/dateutil/dateutil/issues/1284)), fixed by Thomas Grainger (gh pr [#&#8203;1285](https://togithub.com/dateutil/dateutil/issues/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 [@&#8203;hawkEye-01](https://togithub.com/hawkEye-01) (gh issue [#&#8203;1167](https://togithub.com/dateutil/dateutil/issues/1167)). Fixed by [@&#8203;Mifrill](https://togithub.com/Mifrill) (gh pr [#&#8203;1168](https://togithub.com/dateutil/dateutil/issues/1168))

</details>

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setup.py

@@ -25,7 +25,7 @@
     "protobuf==4.25.3",
     "pyarrow==15.0.2",
     "pytest==8.2.0",
-    "python-dateutil==2.8.2",
+    "python-dateutil==2.9.0.post0",
     "pytz==2024.1",
     "six==1.16.0",
     "structlog==23.3.0",