Merge pull request #635 from bckohan/py313

add python 3.13 to CI testing

Author: bckohan

.github/workflows/test.yml

@@ -32,6 +32,7 @@ jobs:
           - python-version: "3.10"
           - python-version: "3.11"
           - python-version: "3.12"
+          - python-version: "3.13"
     steps:
       - uses: actions/checkout@v4
       - name: "Set up Python ${{ matrix.python-version }}"