feat: run github action tests on python 3.11

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 20
     strategy:
       matrix:
-        python-versions: ['3.8', '3.9', '3.10']
+        python-versions: ['3.8', '3.9', '3.10', '3.11']
         os: [ubuntu-18.04, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}