test: test if problem matcher works

Author: DannyvdSluijs

src/JsonSchema/Constraints/Factory.php

@@ -78,7 +78,7 @@ class Factory
      */
     public function __construct(
         ?SchemaStorageInterface $schemaStorage = null,
-        ?UriRetrieverInterface $uriRetriever = null,
+        UriRetrieverInterface $uriRetriever = null,
         int $checkMode = Constraint::CHECK_MODE_NORMAL
     ) {
         // set provided config options