CI: Add tests for Python 3.14

But don't test with tox 3 on it, that is too new-old to care about.

Author: hroncok

.github/workflows/main.yaml

@@ -35,5 +35,6 @@ jobs:
         - py312-tox4
         - py313-tox3
         - py313-tox4
+        - py314-tox4
     # Use GitHub's Linux Docker host
     runs-on: ubuntu-latest

tox.ini

@@ -2,7 +2,7 @@
 
 # This information is repeated in .github/workflows/main.yaml
 # (see https://github.com/fedora-python/tox-github-action/issues/8)
-envlist = py36-tox3,{py37,py38,py39,py310,py311,py312,py313}-tox{3,4}
+envlist = py36-tox3,{py37,py38,py39,py310,py311,py312,py313}-tox{3,4},py314-tox4
 
 [testenv]
 extras =