workerman v5.0.0-beta.8 创建websocket不生效，客户端发不过去消息

<?php
require_once __DIR__ . '/vendor/autoload.php';

use Workerman\Connection\TcpConnection;
use Workerman\Protocols\Http\Request;
use Workerman\Worker;

$worker = new Worker('websocket://0.0.0.0:22004');
$worker->onMessage = function (TcpConnection $connection, $data) {
    var_dump($data);
    //$connection->send('receive success');
};
$worker->onWorkerStart = function ($worker) {
    echo 'Worker start success';
};
$worker->onWebSocketConnect = function (TcpConnection $connection, Request $request) {
    echo 'WebSocket connection success';
};
Worker::runAll();