Check if the model its using soft deletes to enable soft deletes

Add an extra check to see if the query builder should use soft deletes, checking only for the config value lead to unexpected behaviour

Author: nerones

src/Searchable.php

@@ -88,7 +88,7 @@ public function getSearchRules()
      */
     public static function search($query, $callback = null)
     {
-        $softDelete = config('scout.soft_delete', false);
+        $softDelete = $this->usesSoftDelete() && config('scout.soft_delete', false);
 
         if ($query == '*') {
             return new FilterBuilder(new static, $callback, $softDelete);