fix entities test

Author: MBoretto

src/Entities/User.php

@@ -30,7 +30,7 @@ public function __construct(array $data)
 
         $this->first_name = isset($data['first_name']) ? $data['first_name'] : null;
         if (empty($this->first_name)) {
-//            throw new TelegramException('first_name is empty!');
+            throw new TelegramException('first_name is empty!');
         }
 
         $this->last_name = isset($data['last_name']) ? $data['last_name'] : null;