ExchangeInformationResponse is missing order types #216
Description
In COIN and USDS futures, ExchangeInformationResponseSymbolsInner.getOrderType() is always null because /dapi/v1/exchangeInfo and /fapi/v1/exchangeInfo return "orderTypes", but SERIALIZED_NAME_ORDER_TYPE = "OrderType" (not "orderTypes"). We can't get the types because of that.