Add testing for python 3.11

Set up the test for python 3.11 in the CI

.github/workflows/ci.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python: ["3.9", "3.10"]
+        python: ["3.9", "3.10", "3.11"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2