Updates versioneer for Python 3.11 and updated supported versions and tests

Author: oscargus

.github/workflows/tests.yml

@@ -62,9 +62,10 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - 3.6
           - 3.7
           - 3.8
+          - 3.9
+          - '3.10'
           - pypy3
     steps:
     - uses: actions/checkout@v2