Update Player Hand

This packet is sent by the client to the server requesting to set player’s hand item to specified item. In response all clients in the room will receive `upa` packet containing the ID of penguin alongside with an item provided in the request.

Structure

Client-side	%xt%s#upa%room_id%item_id%
Server-side	%xt%upa%room_id%penguin_id%item_id%