Add binary sub protocol to allow communication with websockify. (#4303)

* Remove wsSerial protocol to allow communication with websockify.

* Follow best practices and use an array to define subprotocols, including binary one used by websockify

src/js/protocols/websocket.js

@@ -61,7 +61,7 @@ class WebsocketSerial extends EventTarget {
         this.address = path;
         console.log(`${this.logHead} Connecting to ${this.address}`);
 
-        this.ws = new WebSocket(this.address, "wsSerial");
+        this.ws = new WebSocket(this.address, ["binary", "wsSerial"]);
         let socket = this;
 
         this.ws.onopen = function (e) {