v2.0.0

• Updated rust sdk version to revision c2bb76029ae6d99c741727e0f87abcd734377016, including:
  • Remove dashmap crate usage from matrix-sdk-crypto
  • Bugfix for invalidated private cross signing keys not being persisted
• API Break: RoomId.localpart and RoomId.serverName have been removed.
• Add new secrets API OlmMachine.registerReceiveSecretCallback,
  OlmMachine.getSecretsFromInbox, OlmMachine.deleteSecretsFromInbox.