- Update to 9.1.1:
* Add HostBrowser.update_hosts (#476)
* Handle audio groups removed from known host (#475)
* Remove useless pylint and flake8 directives (#472)
* BREAKING CHANGE: Update discovery to support a list of known hosts (#469)
* Catch errors thrown by select call (#471)
* Fix some strings mangled by black formatting (#470)
* Fix MultiZoneControllerListener (#468)
* Expose volume_control_type (#461)
* Move ReceiverController to its own module (#460)
* Infer contentType from playQueue items (#457) @maykar
* Remove unintended 'async' from listener interfaces (#453)
* Update BubbleUPNP example (#451)
* Refactor listeners and controllers as ABCs (#450)
* Add more google devices to consts (#448) @theychx
* Make current_time optional when loading or queing media (#446)