We are starting a beta for testing new features and bug fixes.
The current beta update mostly contains new VScript functions and cvars which can be useful for modders in creating new and exciting game modes(challenges).
All the details about the beta update are explained in this discussion. Please subscribe to that discussion if you want to get notifications about new updates pushed into beta.
Note: If you switched your game to the Beta update you will be unable to connect to non-beta servers.