Minor update to cater php8

src/Ratchet/Server/IoServer.php

@@ -33,7 +33,7 @@ class IoServer {
      * @param \React\Socket\ServerInterface       $socket   The React socket server to run the Ratchet application off of
      * @param \React\EventLoop\LoopInterface|null $loop     The React looper to run the Ratchet application off of
      */
-    public function __construct(MessageComponentInterface $app, ServerInterface $socket, LoopInterface $loop = null) {
+    public function __construct(MessageComponentInterface $app, ServerInterface $socket, ?LoopInterface $loop = null) {
         if (false === strpos(PHP_VERSION, "hiphop")) {
             gc_enable();
         }
@@ -54,7 +54,10 @@ class IoServer {
      * @param  string                             $address    The address to receive sockets on (0.0.0.0 means receive connections from any)
      * @return IoServer
      */
-    public static function factory(MessageComponentInterface $component, $port = 80, $address = '0.0.0.0') {
+    public static function factory(MessageComponentInterface $component, integer|null $port = null, string|null $address = null) {
+        if ($port == null) $port = 80;
+        if ($address == null) $address = '0.0.0.0';
+
         $loop   = LoopFactory::create();
         $socket = new Reactor($address . ':' . $port, $loop);