fix phpstan test errors

Author: dbu

.github/workflows/static.yml

@@ -17,7 +17,7 @@ jobs:
 
       - name: Pull in optional dependencies
         run: |
-          composer require --no-update symfony/http-kernel symfony/event-dispatcher symfony/process phpunit/phpunit psr/log toflar/psr6-symfony-http-cache-store
+          composer require --no-update symfony/http-kernel symfony/event-dispatcher symfony/process phpunit/phpunit toflar/psr6-symfony-http-cache-store
           composer update --no-dev --no-progress
 
       - name: PHPStan

phpstan.tests.neon.dist

@@ -2,3 +2,6 @@ parameters:
     level: 1
     paths:
         - tests
+    ignoreErrors:
+        # we can add the return type declaration when dropping support for PHP < 7.4
+        - '#Method FOS\\HttpCache\\Tests\\Unit\\SymfonyCache\\AppCache::fetch\(\) should return Symfony\\Component\\HttpFoundation\\Response but return statement is missing.#'