State-reset and security mitigations.

Upgrade Ruma to present.

The following are intentionally benign for activation in a later commit:

- Hydra backports not default.
- Room version 12 not default.
- Room version 12 not listed as stable.

Do not enable them manually or you can brick your database.

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/matrix/mod.rs

@@ -2,10 +2,10 @@
 
 pub mod event;
 pub mod pdu;
-pub mod state_key;
+pub mod room_version;
 pub mod state_res;
 
-pub use event::{Event, TypeExt as EventTypeExt};
-pub use pdu::{Pdu, PduBuilder, PduCount, PduEvent, PduId, RawPduId, ShortId};
-pub use state_key::StateKey;
-pub use state_res::{RoomVersion, StateMap, TypeStateKey};
+pub use event::{Event, StateKey, TypeExt as EventTypeExt, TypeStateKey, state_key};
+pub use pdu::{EventHash, Pdu, PduBuilder, PduCount, PduEvent, PduId, RawPduId, ShortId};
+pub use room_version::{RoomVersion, RoomVersionRules};
+pub use state_res::{StateMap, events};