Trac #31134: Update setuptools and setuptools_scm

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 (#30589)

URL: https://trac.sagemath.org/31134
Reported by: jhpalmieri
Ticket author(s): John Palmieri
Reviewer(s): Matthias Koeppe

build/pkgs/setuptools/checksums.ini

@@ -1,5 +1,5 @@
-tarball=setuptools-VERSION.zip
-sha1=14103612bfd0ff4e5a9469abaa5ecbdc811d5293
-md5=1734619cdb69694cd5939caf60edc8a5
-cksum=210207573
-upstream_url=https://pypi.io/packages/source/s/setuptools/setuptools-VERSION.zip
+tarball=setuptools-VERSION.tar.gz
+sha1=77d3f0bd339c3d7778b3b7dacd14f47d09ac56be
+md5=e22db062c2429f9dd7239aecdeb64d6f
+cksum=3206580377
+upstream_url=https://pypi.io/packages/source/s/setuptools/setuptools-VERSION.tar.gz

build/pkgs/setuptools/package-version.txt

@@ -1 +1 @@
-49.6.0
+51.1.1

build/pkgs/setuptools_scm/checksums.ini

@@ -1,5 +1,5 @@
 tarball=setuptools_scm-VERSION.tar.gz
-sha1=464fcfa8c35f0f1e6dcfe79c0d66cfe6f8e4b5ec
-md5=e6c9fad17c90516d640868eb833d5150
-cksum=723592301
+sha1=af08a257a725dbdde9795859249ddf79caf4fc22
+md5=c11bf23d80224691a46ee5deb84c42db
+cksum=929248754
 upstream_url=https://pypi.io/packages/source/s/setuptools_scm/setuptools_scm-VERSION.tar.gz

build/pkgs/setuptools_scm/package-version.txt

@@ -1 +1 @@
-4.1.2
+5.0.1