Implemented basic Ender Pearls

this doesn't have full functionality yet (like spawning endermites) because some things aren't implemented yet.

src/pocketmine/item/EnderPearl.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\item;
+
+class EnderPearl extends ProjectileItem{
+	public function __construct(int $meta = 0){
+		parent::__construct(self::ENDER_PEARL, $meta, "Ender Pearl");
+	}
+
+	public function getProjectileEntityType() : string{
+		return "ThrownEnderpearl";
+	}
+
+	public function getThrowForce() : float{
+		return 1.5;
+	}
+
+	public function getCooldownTicks() : int{
+		return 20;
+	}
+}

src/pocketmine/item/ItemFactory.php

@@ -151,7 +151,7 @@ class ItemFactory{
 		self::registerItem(new RawChicken());
 		self::registerItem(new CookedChicken());
 		self::registerItem(new RottenFlesh());
-		//TODO: ENDER_PEARL
+		self::registerItem(new EnderPearl());
 		self::registerItem(new BlazeRod());
 		self::registerItem(new Item(Item::GHAST_TEAR, 0, "Ghast Tear"));
 		self::registerItem(new Item(Item::GOLD_NUGGET, 0, "Gold Nugget"));