removed deprecation notices on core code to support PHP 8.4 runtime (…

…see gh#215)

src/Cache.php

@@ -43,7 +43,7 @@ final class Cache
     private int $hits = 0;
     private int $misses = 0;
 
-    public function __construct(string|object $cachePoolAdapter = null)
+    public function __construct(string|object|null $cachePoolAdapter = null)
     {
         if (null === $cachePoolAdapter) {
             $adapter = new ArrayAdapter();

src/Console/Application.php

@@ -47,7 +47,7 @@ public function __construct()
         parent::__construct(self::NAME, self::getPrettyVersion());
     }
 
-    public function run(InputInterface $input = null, OutputInterface $output = null): int
+    public function run(?InputInterface $input = null, ?OutputInterface $output = null): int
     {
         $output ??= new ConsoleOutput(STDOUT);
 

src/Event/EventDispatcher.php

@@ -36,7 +36,7 @@ public function __construct(iterable $extensions)
         }
     }
 
-    public function dispatch(object $event, string $eventName = null): object
+    public function dispatch(object $event, ?string $eventName = null): object
     {
         $triggered = false;
 

src/Helper/ProcessHelper.php

@@ -40,7 +40,7 @@ public function getName(): string
     public function start(
         OutputInterface $output,
         Process $process,
-        callable $callback = null,
+        ?callable $callback = null,
         array $env = [],
         int $verbosity = OutputInterface::VERBOSITY_VERY_VERBOSE
     ): Process {
@@ -97,7 +97,7 @@ private function wrapCallback(
         DebugFormatterHelper $formatter,
         OutputInterface $output,
         Process $process,
-        callable $callback = null
+        ?callable $callback = null
     ): callable {
         return function ($type, $buffer) use ($output, $process, $callback, $formatter) {
             $output->write(

src/Process/LintProcess.php

@@ -40,8 +40,8 @@ final class LintProcess extends Process
 
     public function __construct(
         array $command,
-        string $cwd = null,
-        array $env = null,
+        ?string $cwd = null,
+        ?array $env = null,
         mixed $input = null,
         ?float $timeout = 60
     ) {
@@ -158,7 +158,7 @@ public function getItem(SplFileInfo $fileInfo): LintProcessItem
         return (self::$createLintProcessItem)($hasError, $errorString, $errorLine, $hasWarning, $warningString, $warningLine, $fileInfo);
     }
 
-    public function begin(callable $callback = null, array $env = []): void
+    public function begin(?callable $callback = null, array $env = []): void
     {
         if ($this->helper instanceof ProcessHelper) {
             $this->helper->start($this->output, $this, $callback, $env);