Mautrix

* Dropped Python 3.9 support.
* *(client)* Changed media download methods to log requests and to raise exceptions on non-successful status codes.

* *(client)* Deprecated MSC2716 methods and added new Beeper-specific batch send methods, as upstream MSC2716 support has been abandoned.
* *(util.async_db)* Added `PRAGMA synchronous = NORMAL;` to default pragmas.
* *(types)* Fixed `guest_can_join` field name in room directory response (thanks to ashfame in 163).

* *(crypto)* Changed `OlmMachine.share_keys` to make the OTK count parameter optional. When omitted, the count is fetched from the server.
* *(appservice)* Added option to run appservice transaction event handlers synchronously.
* *(appservice)* Added `log` and `hs_token` parameters to `AppServiceServerMixin` to allow using it as a standalone class without extending.
* *(api)* Added support for setting appservice `user_id` and `device_id` query parameters manually without using `AppServiceAPI`.

* *(util.program)* Removed `--base-config` flag in bridges, as there are no valid use cases (package data should always work) and it's easy to cause issues by pointing the flag at the wrong file.
* *(bridge)* Added support for the `com.devture.shared_secret_auth` login type for automatic double puppeting.
* *(bridge)* Dropped support for syncing with double puppets. MSC2409 is now the only way to receive ephemeral events.
* *(bridge)* Added support for double puppeting with arbitrary `as_token`s.

* Dropped Python 3.8 support.
* **Breaking change *(.state_store)*** Removed legacy SQLAlchemy state store implementations.
* **Mildly breaking change *(util.async_db)*** Changed `SQLiteDatabase` to not remove prefix slashes from database paths.
* Library users should use `sqlite:path.db` instead of `sqlite:///path.db` for relative paths, and `sqlite:/path.db` instead of `sqlite:////path.db` for absolute paths.
* Bridge configs do this migration automatically.
* *(util.async_db)* Added warning log if using SQLite database path that isn't writable.
* *(util.program)* Fixed `manual_stop` not working if it's called during startup.
* *(client)* Stabilized support for asynchronous uploads.
* `unstable_create_msc` was renamed to `create_mxc`, and the `max_stall_ms` parameters for downloading were renamed to `timeout_ms`.
* *(crypto)* Added option to not rotate keys when devices change.
* *(crypto)* Added option to remove all keys that were received before the automatic ratcheting was implemented (in v0.19.10).
* *(types)* Improved reply fallback removal to have a smaller chance of false positives for messages that don't use reply fallbacks.

* *(appservice)* Fixed Python 3.8 compatibility.