test workflow: add python 3.14

Author: ilius

.github/workflows/test.yml

@@ -15,7 +15,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version:
+          - 3.11
+          - 3.12
+          - 3.13
+          - 3.14
 
     runs-on: ubuntu-latest
     steps: