chore(deps-dev): bump setuptools from 51.0.0 to 51.1.0.post20201221

Bumps [setuptools](https://github.com/pypa/setuptools) from 51.0.0 to 51.1.0.post20201221.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/CHANGES.rst)
- [Commits](https://github.com/pypa/setuptools/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

dev-requirements.txt

@@ -14,6 +14,6 @@ twine==1.13.0;python_version<'3.0'
 twine==3.2.0;python_version>='3.6'
 wheel==0.36.2
 setuptools==44.1.0;python_version<'3.0'
-setuptools==51.0.0;python_version>='3.6'
+setuptools==51.1.0.post20201221;python_version>='3.6'
 importlib-metadata==3.3.0;python_version>='3.6'
 importlib-metadata==2.0.0;python_version<'3.0'