- Update to 0.21.2:
* Breaking Changes
+ [#416] Drop support for end-of-life python3.7
+ [#413] Drop usage of logbook in favor of standard library logging
* Features
+ [#409] Support m.space.parent and m.space.child events
+ [#418] Add ability to knock on a room, and enable knocking for a room
* Miscellaneous Tasks
+ [#401] Removing skip for passing test
+ [#406] [#407] [#414] Add content to built-with-nio
* Bug Fixes
+ [#422] async_client.whoami will alter the state of async_client
correctly, and accept all spec-compliant fields.
+ [#408] Properly generate code coverage
- Add patch remove-future-requirement.patch, dropping dependency on future.