add explicit nullable parameter support for php 8.4

Author: krunchyklown

src/IO/AbstractIO.php

@@ -186,5 +186,5 @@ abstract public function read(int $size): string;
     /**
      * @return mixed
      */
-    abstract public function handshake(Authentication $authentication = null, string $brokerServiceUrl = '');
+    abstract public function handshake(?Authentication $authentication = null, string $brokerServiceUrl = '');
 }

src/IO/Factory.php

@@ -21,7 +21,7 @@ class Factory
      * @param Options|null $options
      * @return AbstractIO
      */
-    public static function create(Options $options = null): AbstractIO
+    public static function create(?Options $options = null): AbstractIO
     {
         return new StreamIO($options);
     }

src/IO/StreamIO.php

@@ -114,7 +114,7 @@ public function connect(string $host, int $port, $timeout = null)
      * @return void
      * @throws Exception
      */
-    public function handshake(Authentication $authentication = null, string $brokerServiceUrl = '')
+    public function handshake(?Authentication $authentication = null, string $brokerServiceUrl = '')
     {
         if (is_null($this->socket)) {
             throw new RuntimeException('Connection to the server failed to complete the handshake');

src/Message.php

@@ -102,7 +102,7 @@ public function __construct(MessageIdData     $id,
                                 int               $batchNums = 1,
                                 int               $batchIdx = 0,
                                 int               $redeliveryCount = 0,
-                                MessageCollection $properties = null
+                                ?MessageCollection $properties = null
     )
     {
         $this->id = $id;

src/Policy/DeadLetterPolicy.php

@@ -51,7 +51,7 @@ class DeadLetterPolicy
      * @param ConsumerOptions|null $options
      * @throws OptionsException
      */
-    public function __construct(array $config = [], ConsumerOptions $options = null)
+    public function __construct(array $config = [], ?ConsumerOptions $options = null)
     {
         $this->config = $config;
         $this->options = $options;

src/Proto/AuthData.php

@@ -124,7 +124,7 @@ public function unknownFieldSet()
     /**
      * {@inheritdoc}
      */
-    public static function fromStream($stream, \Protobuf\Configuration $configuration = null)
+    public static function fromStream($stream, ?\Protobuf\Configuration $configuration = null)
     {
         return new self($stream, $configuration);
     }
@@ -173,7 +173,7 @@ public static function descriptor()
     /**
      * {@inheritdoc}
      */
-    public function toStream(\Protobuf\Configuration $configuration = null)
+    public function toStream(?\Protobuf\Configuration $configuration = null)
     {
         $config = $configuration ?: \Protobuf\Configuration::getInstance();
         $context = $config->createWriteContext();