lethanh9398

RCTWebSocketModule - fix error crash when connect webSocket with header value null

9

## Summary: If you make a websocket connection with a Header key whose value is null, the application will crash on iOS. ``` 2024-07-30 15:36:19.684613+0700 mobile[12777:918335] [native] NSInvalidArgumentException: -[NSNull length]:...