Add phpstan as well

Author: jissereitsma

.github/workflows/static-tests.yml

@@ -19,7 +19,7 @@ jobs:
           cd /tmp/magento
           composer config repositories.local-source path package-source/
           composer config --no-plugins allow-plugins true
-          composer require --prefer-source -- ${COMPOSER_NAME}:@dev bitexpert/phpstan-magento phpstan/extension-installer
+          composer require --prefer-source -- ${COMPOSER_NAME}:@dev phpstan/phpstan bitexpert/phpstan-magento phpstan/extension-installer
 
       - name: Run Magento 2 PHPStan Tests
         run: |