Fix mismatch between single-emit and broadcast encoding

src/io/uws.js

@@ -233,8 +233,8 @@ function encode(frame, payload) {
 
 function inRoom(room) {
     return {
-        emit(frame, ...args) {
-            const encoded = encode(frame, args);
+        emit(frame, payload) {
+            const encoded = encode(frame, payload);
 
             for (let wrapper of rooms.get(room)) {
                 wrapper._uwsSocket.send(encoded);

test/io/uws.js

@@ -1,6 +1,7 @@
 const { EventEmitter } = require('events');
 const assert = require('assert');
 const { UWSServer } = require('../../lib/io/uws');
+const inRoom = require('../../lib/io/uws')['in'];
 const WebSocket = require('uws');
 
 describe('UWSServer', () => {
@@ -115,6 +116,19 @@ describe('UWSServer', () => {
         });
     });
 
+    it('broadcasts to a room', done => {
+        server.on('connection', s => {
+            s.join('testroom');
+            inRoom('testroom').emit('test', { foo: 'bar' });
+        });
+
+        socket = connect();
+        socket.test.on('test', data => {
+            assert.deepStrictEqual(data, { foo: 'bar' });
+            done();
+        });
+    });
+
     it('responds with an ack frame', done => {
         server.on('connection', s => {
             s.on('test', (data, ack) => {