fix text packet (reference https://github.com/PocketMine/PocketMine-MP/blob/master/src/pocketmine/network/protocol/TextPacket.php#L42)
fix text packet (reference https://github.com/PocketMine/PocketMine-MP/blob/master/src/pocketmine/network/protocol/TextPacket.php#L42)

mhsjlw/pocket-minecraft-protocol