Implement dispose method on WebSocketMessageReader.

Author: ethan-vanderheijden

packages/vscode-ws-jsonrpc/src/socket/reader.ts

@@ -53,12 +53,20 @@ export class WebSocketMessageReader extends AbstractMessageReader implements Mes
         return {
             dispose: () => {
                 if (this.callback === callback) {
+                    this.state = 'initial';
                     this.callback = undefined;
                 }
             }
         };
     }
 
+    override dispose() {
+        super.dispose();
+        this.state = 'initial';
+        this.callback = undefined;
+        this.events.splice(0, this.events.length);
+    }
+
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     protected readMessage(message: any): void {
         if (this.state === 'initial') {