Add missing notification verification fields

appstore/validator.go

@@ -171,5 +171,6 @@ func (c *Client) parseResponse(resp *http.Response, result interface{}, ctx cont
 		// 21007 is found when the receipt is from the test environment
 		return Sandbox, json.NewDecoder(resp.Body).Decode(result)
 	}
+
 	return Production, nil
 }