added missing @var property types (reported by phpstan)

src/pocketmine/scheduler/AsyncTask.php

@@ -59,12 +59,16 @@ abstract class AsyncTask extends Collectable{
 	/** @var \Threaded */
 	public $progressUpdates;
 
+	/** @var scalar|null */
 	private $result = null;
+	/** @var bool */
 	private $serialized = false;
+	/** @var bool */
 	private $cancelRun = false;
 	/** @var int|null */
 	private $taskId = null;
 
+	/** @var bool */
 	private $crashed = false;
 
 	public function run(){

src/pocketmine/scheduler/AsyncWorker.php

@@ -35,7 +35,9 @@ class AsyncWorker extends Worker{
 	/** @var mixed[] */
 	private static $store = [];
 
+	/** @var \ThreadedLogger */
 	private $logger;
+	/** @var int */
 	private $id;
 
 	/** @var int */

src/pocketmine/scheduler/BulkCurlTask.php

@@ -34,6 +34,7 @@ use function unserialize;
  * The result of this AsyncTask is an array of arrays (returned from {@link Internet::simpleCurl}) or InternetException objects.
  */
 class BulkCurlTask extends AsyncTask{
+	/** @var string */
 	private $operations;
 
 	/**

src/pocketmine/scheduler/SendUsageTask.php

@@ -44,7 +44,9 @@ class SendUsageTask extends AsyncTask{
 	public const TYPE_STATUS = 2;
 	public const TYPE_CLOSE = 3;
 
+	/** @var string */
 	public $endpoint;
+	/** @var string */
 	public $data;
 
 	/**