fix typo

Author: kitar

src/Kitar/Dynamodb/Query/Processor.php

@@ -40,7 +40,7 @@ public function processMultipleItems(Result $res, $model_class)
             $item = $this->marshaler->unmarshalItem($item);
 
             if ($model_class) {
-                $item = (new $model_class)-newFromBuilder($item);
+                $item = (new $model_class)->newFromBuilder($item);
             }
         }