Kieu Huynh Thanh Tung

Results 2 issues of Kieu Huynh Thanh Tung

The "batchOrders" must be a JSON string, not a "NewFuturesOrder[]". I encountered an error when attempting to place multiple orders using "futuresBatchOrders", which looked like this: ![image](https://github.com/ViewBlock/binance-api-node/assets/64318804/8837b827-e854-4ba6-a761-19d9c1cb4c03) ![image](https://github.com/ViewBlock/binance-api-node/assets/64318804/8c15387c-09ae-4c1b-aba4-e8ebfadaebee) The issue...

Related issues: #541, #542, #547