exchanges: Update OKCoin V5 exchange support (#1206)

* starting public endpoints

* Adding public endpoints

* added public spot market endpoints

* websocket subscriptions updates

* websocket push data handlers completing

* linter fix

* Added funding private endpoints

* Adding authenticated account endpoints

* Added fiat and OTC-RFQ authenticated endpoints

* trading authenticated endpoints

* completing trade endpoints and add public wrapper endpoints

* Authenticated wrapper functions and corresponding unit test

* Adding authenticated websocket endpoint and fixing wrapper functions

* Documentation and exchange websocket update

* update websocket orderbook checksum handling

* linter issues fix and unit test update

* remove invalid orderbook endpoint and unit test

* Documentation, handlers, and model types update

* minot fix

* Minor fixes

* Updating unit tests and added missing endpoints

* Add missing credential check

* Minor unit test fixes

* fix minor linter issue

* add snaphot test unit test

* Fix on update checksum and documentation update

* update exchange, add UpdateOrderExecutionLimits, and update documentation

* Minor fix on tickers fetching

* Minor websocket fix and smaill unit tests

* Minor websocket and naming fixes

* uncomment default channels

* Fix type and unit test issues

* websocket channels and data handling update

* Update Advanced-Algo websocket handling and minor fixes

* documentation and minor code fixes

* Fix name changes

* documentation contribution update

* intervalToString method update

* fix exchange_wrapper_standard tests

* Fix minor issues based on exchange_wrapper_standards_test

* Fix wrapper extended candlestick check

* websocket orders fetching error check method update

* Exchange name check and change

* docs: Add missing contributors

---------

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

testdata/configtest.json

@@ -1978,7 +1978,7 @@
    ]
   },
   {
-   "name": "OKCOIN International",
+   "name": "Okcoin",
    "enabled": true,
    "verbose": false,
    "httpTimeout": 15000000000,
@@ -1998,8 +1998,7 @@
     },
     "useGlobalFormat": true,
     "assetTypes": [
-     "spot",
-     "margin"
+     "spot"
     ],
     "pairs": {
      "spot": {

testdata/exchangelist.csv

@@ -18,7 +18,7 @@ huobi,
 itbit,
 kraken,
 lbank,
-okcoin international,
+okcoin,
 okx,
 poloniex,
 yobit,