ci: Add python 3.13 & 3.14-dev to the CI

Author: dcermak

.github/workflows/default.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     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", "3.14-dev"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python_version }}