Bump gitpython from 3.1.40 to 3.1.43 (#515)

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.40 to 3.1.43.
- [Release notes](https://github.com/gitpython-developers/GitPython/releases)
- [Changelog](https://github.com/gitpython-developers/GitPython/blob/main/CHANGES)
- [Commits](gitpython-developers/GitPython@3.1.40...3.1.43)

---
updated-dependencies:
- dependency-name: gitpython
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

extra_requirements/requirements-tests.txt

@@ -1,7 +1,7 @@
 corner==2.2.1
 coveralls==3.3.1
 emcee==3.1.4
-gitpython==3.1.40
+gitpython==3.1.43
 gvar==12.1
 h5py==3.10.0
 hypothesis==6.21.1