Log Message:
py-setuptools: updated to 50.3.2

v50.3.2

Documentation changes
* Extended towncrier news template to include change note categories. This \ 
allows to see what types of changes a given version introduces
* Started enforcing strict syntax and reference validation in the Sphinx docs
* Removed redundant Sphinx Makefile support

Misc
* Enabled test results reporting in AppVeyor CI
* Replace Python 3.9.0 beta with 3.9.0 final on GitHub Actions.
* Python 3.9 Trove classifier got added to the dist metadata

v50.3.1

Documentation changes
* Finalized doc revamp.
* doc: simplify index and group deprecated files
* doc overhaul step 2: break main doc into multiple sections
* doc overhaul step 3: update userguide
* Added a :user: role to Sphinx config
* Added an illustrative explanation about the change notes to fragments dir

Misc
* Travis CI test suite now tests against PPC64.
* Suppress EOF errors (and other exceptions) when importing lib2to3.