ZB fetchOrders 'stop'
ZB fetchOrders 'stop'

Added stop order functionality to fetchOrders:
```
node examples/js/cli zb fetchOrders BTC/USDT:USDT undefined undefined '{"stop":"true","orderType":"1"}'

zb.fetchOrders (BTC/USDT:USDT, , , [object Object])
2022-04-14T05:55:46.133Z iteration 0 passed in 353 ms

                 id |       clientOrderId |     timestamp |                 datetime | lastTradeTimestamp |        symbol |  type | timeInForce | postOnly | side | price | stopPrice | average | cost | amount | filled | remaining |   status | fee | trades | fees
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
6919883218443511808 | 6896693805014120448 | 1649828724490 | 2022-04-13T05:45:24.490Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919883618416535552 | 6896693805014120448 | 1649828819851 | 2022-04-13T05:46:59.851Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919883872314533888 | 6896693805014120448 | 1649828880385 | 2022-04-13T05:48:00.385Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919884136668932096 | 6896693805014120448 | 1649828943412 | 2022-04-13T05:49:03.412Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919884551305242624 | 6896693805014120448 | 1649829042269 | 2022-04-13T05:50:42.269Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919885785189787648 | 6896693805014120448 | 1649829336450 | 2022-04-13T05:55:36.450Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6919889082776758272 | 6896693805014120448 | 1649830122656 | 2022-04-13T06:08:42.656Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           | canceled |     |     [] |   []
6920240520866506752 | 6896693805014120448 | 1649913912026 | 2022-04-14T05:25:12.026Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           |     open |     |     [] |   []
6920240642849449984 | 6896693805014120448 | 1649913941109 | 2022-04-14T05:25:41.109Z |                    | BTC/USDT:USDT | limit |             |    false |    5 | 30000 |     31000 |         |      |  0.003 |        |           |     open |     |     [] |   []
9 objects
```

ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt