Update dependency GitPython to v3.1.37 (#341)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [GitPython](https://togithub.com/gitpython-developers/GitPython) |
`==3.1.36` -> `==3.1.37` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/GitPython/3.1.37?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/GitPython/3.1.37?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/GitPython/3.1.36/3.1.37?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/GitPython/3.1.36/3.1.37?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>gitpython-developers/GitPython (GitPython)</summary>

###
[`v3.1.37`](https://togithub.com/gitpython-developers/GitPython/releases/tag/3.1.37):
- a proper fix CVE-2023-41040

[Compare
Source](https://togithub.com/gitpython-developers/GitPython/compare/3.1.36...3.1.37)

#### What's Changed

- Improve Python version and OS compatibility, fixing deprecations by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1654](https://togithub.com/gitpython-developers/GitPython/pull/1654)
- Better document env_case test/fixture and cwd by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1657](https://togithub.com/gitpython-developers/GitPython/pull/1657)
- Remove spurious executable permissions by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1658](https://togithub.com/gitpython-developers/GitPython/pull/1658)
- Fix up checks in Makefile and make them portable by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1661](https://togithub.com/gitpython-developers/GitPython/pull/1661)
- Fix URLs that were redirecting to another license by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1662](https://togithub.com/gitpython-developers/GitPython/pull/1662)
- Assorted small fixes/improvements to root dir docs by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1663](https://togithub.com/gitpython-developers/GitPython/pull/1663)
- Use venv instead of virtualenv in test_installation by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1664](https://togithub.com/gitpython-developers/GitPython/pull/1664)
- Omit py_modules in setup by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1665](https://togithub.com/gitpython-developers/GitPython/pull/1665)
- Don't track code coverage temporary files by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1666](https://togithub.com/gitpython-developers/GitPython/pull/1666)
- Configure tox by [@&#8203;EliahKagan](https://togithub.com/EliahKagan)
in
[https://github.com/gitpython-developers/GitPython/pull/1667](https://togithub.com/gitpython-developers/GitPython/pull/1667)
- Format tests with black and auto-exclude untracked paths by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1668](https://togithub.com/gitpython-developers/GitPython/pull/1668)
- Upgrade and broaden flake8, fixing style problems and bugs by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1673](https://togithub.com/gitpython-developers/GitPython/pull/1673)
- Fix rollback bug in SymbolicReference.set_reference by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1675](https://togithub.com/gitpython-developers/GitPython/pull/1675)
- Remove `@NoEffect` annotations by
[@&#8203;EliahKagan](https://togithub.com/EliahKagan) in
[https://github.com/gitpython-developers/GitPython/pull/1677](https://togithub.com/gitpython-developers/GitPython/pull/1677)
- Add more checks for the validity of refnames by
[@&#8203;facutuesca](https://togithub.com/facutuesca) in
[https://github.com/gitpython-developers/GitPython/pull/1672](https://togithub.com/gitpython-developers/GitPython/pull/1672)

**Full Changelog**:
gitpython-developers/GitPython@3.1.36...3.1.37

</details>

---

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requirements.txt

@@ -2,7 +2,7 @@
 aiofiles==23.2.1
 black==23.9.1
 coverage==7.3.1
-GitPython==3.1.36
+GitPython==3.1.37
 mypy==1.5.1
 nest_asyncio==1.5.8
 pdoc==14.1.0