Add Python 3.13 to ci

Author: jw3

.github/workflows/python.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
     steps:
       - uses: actions/checkout@v3
       - name: Install requirements