* command filter now can be sets with BotCommand object instead of or together with plain strings
* CR fix: fix isinstance
* CR fix: add tests, fix union
* CR fix: add isinstance check
* CR fix: add isinstance check
* CR fix: add forgotten format
* CR fix: bugfix with type guard
* CR fix: fix function names, replace map to generator comprehension
* Create test case for invalid 'FSMContextProxy.update()' function
* Fix invalid 'FSMContextProxy.update()' function
* Verify that written data has been stored and read back correctly