GA: test with Python 3.11

Author: sebastinas

.github/workflows/build.yaml

@@ -14,7 +14,13 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy-3.7"]
+        python-version:
+        - "3.7"
+        - "3.8"
+        - "3.9"
+        - "3.10"
+        - "3.11"
+        - "pypy-3.7"
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}