Modernize property type declarations

src/inventory/transaction/CraftingTransaction.php

@@ -48,15 +48,13 @@ use function intdiv;
  * results, with no remainder. Any leftovers are expected to be emitted back to the crafting grid.
  */
 class CraftingTransaction extends InventoryTransaction{
-	/** @var CraftingRecipe|null */
-	protected $recipe;
-	/** @var int|null */
-	protected $repetitions;
+	protected ?CraftingRecipe $recipe;
+	protected ?int $repetitions;
 
 	/** @var Item[] */
-	protected $inputs = [];
+	protected array $inputs = [];
 	/** @var Item[] */
-	protected $outputs = [];
+	protected array $outputs = [];
 
 	private CraftingManager $craftingManager;
 

src/inventory/transaction/InventoryTransaction.php

@@ -55,22 +55,21 @@ use function spl_object_id;
  * @see InventoryAction
  */
 class InventoryTransaction{
-	/** @var bool */
-	protected $hasExecuted = false;
-	/** @var Player */
-	protected $source;
+	protected bool $hasExecuted = false;
 
 	/** @var Inventory[] */
-	protected $inventories = [];
+	protected array $inventories = [];
 
 	/** @var InventoryAction[] */
-	protected $actions = [];
+	protected array $actions = [];
 
 	/**
 	 * @param InventoryAction[] $actions
 	 */
-	public function __construct(Player $source, array $actions = []){
-		$this->source = $source;
+	public function __construct(
+		protected Player $source,
+		array $actions = []
+	){
 		foreach($actions as $action){
 			$this->addAction($action);
 		}

src/inventory/transaction/action/InventoryAction.php

@@ -32,15 +32,10 @@ use pocketmine\player\Player;
  * Represents an action involving a change that applies in some way to an inventory or other item-source.
  */
 abstract class InventoryAction{
-	/** @var Item */
-	protected $sourceItem;
-	/** @var Item */
-	protected $targetItem;
-
-	public function __construct(Item $sourceItem, Item $targetItem){
-		$this->sourceItem = $sourceItem;
-		$this->targetItem = $targetItem;
-	}
+	public function __construct(
+		protected Item $sourceItem,
+		protected Item $targetItem
+	){}
 
 	/**
 	 * Returns the item that was present before the action took place.

src/inventory/transaction/action/SlotChangeAction.php

@@ -33,15 +33,13 @@ use pocketmine\player\Player;
  * Represents an action causing a change in an inventory slot.
  */
 class SlotChangeAction extends InventoryAction{
-
-	/** @var Inventory */
-	protected $inventory;
-	private int $inventorySlot;
-
-	public function __construct(Inventory $inventory, int $inventorySlot, Item $sourceItem, Item $targetItem){
+	public function __construct(
+		protected Inventory $inventory,
+		private int $inventorySlot,
+		Item $sourceItem,
+		Item $targetItem
+	){
 		parent::__construct($sourceItem, $targetItem);
-		$this->inventory = $inventory;
-		$this->inventorySlot = $inventorySlot;
 	}
 
 	/**