test on py3.13

Author: DavidBuchanan314

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.11', '3.12' ]
+        python-version: [ '3.11', '3.12', '3.13' ]
     name: Python ${{ matrix.python-version }} tests
     steps:
       - uses: actions/checkout@v4