Run tests on Python 3.13 beta (#166)

Author: oittaa

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13-dev']
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}