Add GH Actions scheduled tests, Python 3.12 and on push to master

Author: ylep

.github/workflows/tox.yaml

@@ -4,14 +4,17 @@ on:
   pull_request:
     branches:
       - master
+  push:
+    branches:
+      - master
   schedule:
-  - cron: "34 22 * * SUN"  # run weekly
+    - cron: "34 22 * * SUN"  # run weekly
 jobs:
   build:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.11', '3.10', '3.9', '3.8', '3.7' ]
+        python-version: [ '3.12', '3.11', '3.10', '3.9', '3.8', '3.7' ]
         runs-on: ['ubuntu-latest']
         include:
         - runs-on: 'ubuntu-20.04'