Update setuptools requirement from ~=49.6.0 to ~=50.3.0 (#84)

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/master/CHANGES.rst)
- [Commits](pypa/setuptools@v49.6.0...v50.3.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -24,4 +24,4 @@ urllib3==1.25.10
 wcwidth==0.2.5
 
 pip~=20.2.3
-setuptools~=49.6.0
+setuptools~=50.3.0