Test with Python 3.14

Author: benmwebb

.github/workflows/testpy.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
         include:
         - os: macos-latest
           python-version: '3.10'