V1.1.0

Fixed an issue where all synchronisation broke after leaving a lobby and joining a new one in the same session.

Added UpdateItemPrice method. Use this to update the price of items anytime during a game, and they'll be synchronised between players.
- This will also reload the store, so the current cart gets reset.

Removed mistakenly marked static fields from SynchronisedMetadata<T>. These are now instance fields:

public static bool InLobby -> public bool InLobby
public static bool IsHost -> public bool IsHost

See the readme for setup and usage instructions.