Run "Unit tests" Github Actions on PR and pushes for master branch

Author: max-ipinfo

.github/workflows/phpunit.yaml

@@ -1,7 +1,12 @@
 name: Unit Tests
 
 on:
+  push:
+    branches:
+      - master
   pull_request:
+    branches:
+      - master
 
 permissions:
   contents: read