- Fixed null value declaration

src/Util/DumpHandler.php

@@ -5,13 +5,10 @@ namespace Negundo\Client\Util;
 use Negundo\Client\DataInterface;
 
 class DumpHandler {
-
-    public ? DataInterface $dataManipulator;
-
-    public function __construct(DataInterface $dataManipulator = null)
-    {
-        $this->dataManipulator = $dataManipulator;
-    }
+    
+    public function __construct(
+        public ? DataInterface $dataManipulator = null
+    ) {}
 
     public function dumpData(...$content) : array
     {

src/Util/ExceptionHandler.php

@@ -6,12 +6,9 @@ use Negundo\Client\DataInterface;
 
 class ExceptionHandler {
 
-    public ? DataInterface $dataManipulator;
-
-    public function __construct(DataInterface $dataManipulator = null)
-    {
-        $this->dataManipulator = $dataManipulator;
-    }
+    public function __construct(
+        public ? DataInterface $dataManipulator = null
+    ) {}
 
     public function extractExceptionData(\Throwable $ex, array $serverData, array $postData, $dataManipulator = null) : array
     {

src/Util/TaskHandler.php

@@ -6,12 +6,9 @@ use Negundo\Client\DataInterface;
 
 class TaskHandler {
 
-    public ? DataInterface $dataManipulator;
-
-    public function __construct(DataInterface $dataManipulator = null)
-    {
-        $this->dataManipulator = $dataManipulator;
-    }
+    public function __construct(
+        public ? DataInterface $dataManipulator = null
+    ) {}
 
     public function sendReport(string $message, ? string $title = null, array $data = [], array $events = []) : array
     {