Add python 3.14 testing.

Author: tjhowse

.github/workflows/python-app.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.11.x", "3.12.x", "3.13.x"]
+        python-version: ["3.11.x", "3.12.x", "3.13.x", "3.14.x"]
 
     env:
       MQTT_HOST: 127.0.0.1