Add BitMart reference

README.md

@@ -73,6 +73,7 @@ CryptoExchange.Net also allows for [easy access to different exchange API's](htt
 |BingX|[JKorf/BingX.Net](https://github.com/JKorf/BingX.Net)|[![Nuget version](https://img.shields.io/nuget/v/JK.BingX.net.svg?style=flat-square)](https://www.nuget.org/packages/JK.BingX.Net)|
 |Bitfinex|[JKorf/Bitfinex.Net](https://github.com/JKorf/Bitfinex.Net)|[![Nuget version](https://img.shields.io/nuget/v/Bitfinex.net.svg?style=flat-square)](https://www.nuget.org/packages/Bitfinex.Net)|
 |Bitget|[JKorf/Bitget.Net](https://github.com/JKorf/Bitget.Net)|[![Nuget version](https://img.shields.io/nuget/v/JK.Bitget.net.svg?style=flat-square)](https://www.nuget.org/packages/JK.Bitget.Net)|
+|BitMart|[JKorf/BitMart.Net](https://github.com/JKorf/BitMart.Net)|[![Nuget version](https://img.shields.io/nuget/v/BitMart.net.svg?style=flat-square)](https://www.nuget.org/packages/BitMart.Net)|
 |CoinEx|[JKorf/CoinEx.Net](https://github.com/JKorf/CoinEx.Net)|[![Nuget version](https://img.shields.io/nuget/v/CoinEx.net.svg?style=flat-square)](https://www.nuget.org/packages/CoinEx.Net)|
 |CoinGecko|[JKorf/CoinGecko.Net](https://github.com/JKorf/CoinGecko.Net)|[![Nuget version](https://img.shields.io/nuget/v/CoinGecko.net.svg?style=flat-square)](https://www.nuget.org/packages/CoinGecko.Net)|
 |Gate.io|[JKorf/GateIo.Net](https://github.com/JKorf/GateIo.Net)|[![Nuget version](https://img.shields.io/nuget/v/GateIo.net.svg?style=flat-square)](https://www.nuget.org/packages/GateIo.Net)|