drop python 3.6 in tests and setup.cfg

Author: Cube707

.github/workflows/run-tests.yaml

@@ -54,11 +54,11 @@ jobs:
           - ubuntu-latest
           - windows-latest
         python-version:
-          - '3.6'
           - '3.7'
           - '3.8'
           - '3.9'
           - '3.10'
+          - '3.11'
     steps:
       - name: Checkout
         uses: actions/checkout@v3

setup.cfg

@@ -18,7 +18,6 @@ classifiers =
     Operating System :: POSIX :: Linux
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9