run unit tests on 3.12

.github/workflows/python.yml

@@ -29,10 +29,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python 3.11
+    - name: Set up Python 3.12
       uses: actions/setup-python@v4
       with:
-        python-version: '3.11'
+        python-version: '3.12'
       # flake8 version should be same as the version in requirements/test.txt
       # to avoid lint errors on CI
     - name: pip install flak8
@@ -64,7 +64,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["pypy-3.10-v7.3.12", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["pypy-3.10-v7.3.12", "3.8", "3.9", "3.10", "3.11", "3.12"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
@@ -84,7 +84,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}