Bump gitpython from 3.1.7 to 3.1.11

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.7 to 3.1.11.
- [Release notes](https://github.com/gitpython-developers/GitPython/releases)
- [Changelog](https://github.com/gitpython-developers/GitPython/blob/master/CHANGES)
- [Commits](https://github.com/gitpython-developers/GitPython/compare/3.1.7...3.1.11)

Signed-off-by: dependabot-preview[bot] <[email protected]>

requirements-dev.txt

@@ -2,7 +2,7 @@ Click==7.1.2
 coverage==5.2.1
 ddt==1.4.1
 flake8==3.8.3
-gitpython==3.1.7
+gitpython==3.1.11
 mock==3.0.5
 pytest==6.0.1; python_version >= '3.5'
 pytest==4.6.5; python_version < '3.5'