Update setuptools and setuptools_scm

[jhpalmieri]

Just a version bump for each of these packages.

• https://setuptools.readthedocs.io/en/latest/history.html
  • 50.0.1 added support for Python 3.10
  • 51.0.0 dropped support for Python < 3.6.
  • 51.1.0 contains a minor fix for use with pip 20.3 (Upgrade Python to 3.9.1, pip to 20.3.3 #30589)

Component: packages: standard

Author: John Palmieri

Branch/Commit: 5c86b59

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/31134

[jhpalmieri]

Branch: u/jhpalmieri/update-setuptools

[jhpalmieri]

New commits:

5c86b59

trac 31134: update setuptools, setuptools_scm

[jhpalmieri]

Commit: 5c86b59

[mkoeppe]

comment:4

Note numpy sets a constraint setuptools<49.2.0 but we also our current version of setuptools is outside that range.

[jhpalmieri]

comment:5

Yes, I saw that, but numpy builds with this new version, too (in my limited testing).

[mkoeppe]

Reviewer: Matthias Koeppe

[vbraun]

Changed branch from u/jhpalmieri/update-setuptools to 5c86b59