add Limits class with integer bounds constants

src/Limits.php

@@ -0,0 +1,47 @@
+<?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\utils;
+
+final class Limits{
+
+	private function __construct(){
+		//NOOP
+	}
+
+	public const UINT8_MAX = 0xff;
+	public const INT8_MIN = -0x7f - 1;
+	public const INT8_MAX = 0x7f;
+
+	public const UINT16_MAX = 0xffff;
+	public const INT16_MIN = -0x7fff - 1;
+	public const INT16_MAX = 0x7fff;
+
+	public const UINT32_MAX = 0xffffffff;
+	public const INT32_MIN = -0x7fffffff - 1;
+	public const INT32_MAX = 0x7fffffff;
+
+	public const UINT64_MAX = 0xffffffffffffffff;
+	public const INT64_MIN = -0x7fffffffffffffff - 1;
+	public const INT64_MAX = 0x7fffffffffffffff;
+}