Log Message:
py-setuptools: updated to 63.4.0

v63.4.0
-------
Changes
* ``upload_docs`` command is deprecated once again.
* Merge with pypa/distutils@129480b, including substantial delinting and \ 
cleanup, some refactoring around compiler logic, better messaging in \ 
cygwincompiler.

Documentation changes
* Installed ``sphinx-hoverxref`` extension to show tooltips on internal an \ 
external references.
* Installed ``sphinx-notfound-page`` extension to generate nice 404 pages.

Misc
* Merge with pypa/distutils@c397f4c