Fix phpstan

Author: theofidry

phpstan.neon

@@ -25,6 +25,7 @@ parameters:
         # https://github.com/doctrine/doctrine2/pull/7298/files
         - '#Strict comparison using === between null and int will always evaluate to false\.#'
         - '#Strict comparison using !== between null and null will always evaluate to false\.#'
+        - '#Class ApiPlatform\\Core\\Tests\\Fixtures\\TestBundle\\Entity\\DummyBis not found.#'
 
         # Expected, due to deprecations
         - '#Method ApiPlatform\\Core\\Bridge\\Doctrine\\Orm\\Extension\\QueryResult(Item|Collection)ExtensionInterface::getResult\(\) invoked with 4 parameters, 1 required\.#'