Run tests on PHP 8.4 and update test environment

Author: PaulRotmann

.github/workflows/ci.yml

@@ -7,10 +7,11 @@ on:
 jobs:
   PHPUnit:
     name: PHPUnit (PHP ${{ matrix.php }})
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         php:
+          - 8.4
           - 8.3
           - 8.2
           - 8.1
@@ -38,7 +39,7 @@ jobs:
 
   PHPUnit-hhvm:
     name: PHPUnit (HHVM)
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     continue-on-error: true
     steps:
       - uses: actions/checkout@v4

src/Client.php

@@ -28,7 +28,7 @@ class Client
      * @param ?LoopInterface $loop
      * @param ?MulticastFactory $multicast
      */
-    public function __construct(LoopInterface $loop = null, MulticastFactory $multicast = null)
+    public function __construct(?LoopInterface $loop = null, ?MulticastFactory $multicast = null)
     {
         $this->loop = $loop ?: Loop::get();
         $this->multicast = $multicast ?: new MulticastFactory($this->loop);