Run workflow for PRs, also

Author: martin-helmich

.github/workflows/php.yml

@@ -1,6 +1,12 @@
 name: Unit tests
 
-on: [push]
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - '*'
+  pull_request:
 
 jobs:
   build:
@@ -61,4 +67,4 @@ jobs:
         CC_TEST_REPORTER_ID: ${{ secrets.codeClimateReporterID }}
       with:
         coverageCommand: ./vendor/bin/phpunit --coverage-clover=clover.xml
-        debug: true
+        debug: true