Run tests on Python 3.11

Author: Jackenmen

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, windows-2019, macos-11]
-        python-version: [ '3.6', '3.7', '3.8', '3.9', '3.10']
+        python-version: [ '3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
     steps:
     - uses: actions/checkout@v2
       with: