Move base offset to Human from Player

fixes jojoe77777/Slapper#58

src/pocketmine/Player.php

@@ -291,8 +291,6 @@ class Player extends Human implements CommandSender, InventoryHolder, ChunkLoade
 
 	protected $stepHeight = 0.6;
 
-	protected $baseOffset = 1.62;
-
 	public $usedChunks = [];
 	protected $chunkLoadCount = 0;
 	protected $loadQueue = [];