RFE - add protocols option to WS constructor

[space88man]

Is your feature request related to a problem? Please describe.
WebSocketTransport.ts does not accept a protocols option to the constructor of WS

Describe the solution you'd like

constructor(uri: string, protocols?: string | string[]) {
    super();
    this.uri = uri;
    this.connection = new WS(uri, protocols);
  }

Describe alternatives you've considered

• subclass Transport - but this class is not exposed in v2.0.0 (in v1.8.1 - this could be hacked by import from @open-rpc/client-js/build/transports/Transport
• subclass WebSocketTransport - this works but there will be a bogus WS connection due to WS(url, protocols === undefined) in super(); in the subclass the second call to WS(url, protocols) will succeed

Additional context
In v2.0.0 the workaround is to hack using node_modules/@open-rpc/client-js/dist/transports/Transport