fix: Allow changing of value owner factory value for easier tests

Author: Stephan Wentz

src/Owner/ValueOwnerFactory.php

@@ -26,4 +26,9 @@ public function createOwner(): OwnerInterface
     {
         return new Owner($this->value);
     }
+
+    public function setValue(string $value): void
+    {
+        $this->value = $value;
+    }
 }