Use manually installed phpunit

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.github/workflows/phpunit.yml

@@ -67,7 +67,7 @@ jobs:
 
       - name: PHPUnit
         working-directory: apps/${{ env.APP_NAME }}
-        run: ./vendor/phpunit/phpunit/phpunit -c tests/phpunit.xml
+        run: phpunit -c tests/phpunit.xml
 
   mysql:
     runs-on: ubuntu-latest
@@ -134,7 +134,7 @@ jobs:
 
       - name: PHPUnit
         working-directory: apps/${{ env.APP_NAME }}
-        run: ./vendor/phpunit/phpunit/phpunit -c tests/phpunit.xml
+        run: phpunit -c tests/phpunit.xml
 
   pgsql:
     runs-on: ubuntu-latest
@@ -203,7 +203,7 @@ jobs:
 
       - name: PHPUnit
         working-directory: apps/${{ env.APP_NAME }}
-        run: ./vendor/phpunit/phpunit/phpunit -c tests/phpunit.xml
+        run: phpunit -c tests/phpunit.xml
 
   oci:
     runs-on: ubuntu-latest
@@ -265,4 +265,4 @@ jobs:
 
       - name: PHPUnit
         working-directory: apps/${{ env.APP_NAME }}
-        run: ./vendor/phpunit/phpunit/phpunit -c tests/phpunit.xml
+        run: phpunit -c tests/phpunit.xml