add bibox error code 2085
appears to be missing. see error message: `ccxt.base.errors.ExchangeError: bibox {"result":[{"error":{"code":"2085","msg":"币种最小下单数量限制","min_amount":0.005,"symbol":"ETH"},"cmd":"orderpending/trade"}],"error":{"code":"2085","msg":"币种最小下单数量限制","min_amount":0.005,"symbol":"ETH"},"cmd":"orderpending/trade"}`
[ci skip]