Add Python 3.11 in CI

Author: gnikit

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
       fail-fast: false
     runs-on: ${{ matrix.os }}