Update test.yml

Author: fsbraun

.github/workflows/test.yml

@@ -1,14 +1,18 @@
 name: CodeCov
 
-on: [push, pull_request]
+on: 
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   unit-tests:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12"]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
         requirements-file: [
           dj42_cms311.txt,
           dj42_cms41.txt,