expand test suite for Python 3.13 and 3.14

Author: svlandeg

.github/workflows/test.yml

@@ -35,6 +35,8 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
+          - "3.14"
       fail-fast: false
     steps:
       - name: Dump GitHub context