feat(resolver): add DumpResolver for empty values when is needed

Author: anteriovieira

src/Resolvers/DumpResolver.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace OwenIt\Auditing\Resolvers;
+
+use OwenIt\Auditing\Contracts\Auditable;
+use OwenIt\Auditing\Contracts\Resolver;
+
+class DumpResolver implements Resolver
+{
+    public static function resolve(Auditable $auditable): string
+    {
+        return '';
+    }
+}