* Add change service
* test subtract
* Test no change if timer not running
* Modify example
* Raise
* Finalize
* test event
* Fix tests
* Fix tracking time
* Add yamllint (in pre-commit and CI)
* Fix linting for all YAML files
* Bump and add it to requirements
* Fix gen_requirements for pre-commit, remove 'v' from version
* Added timer component
* Reworked functionality a bit
* Fixed requested change
* Fixed state updates when finished
* Removing expired listeners, added events, changed services
* Added finish service
* Using timedelta parameters in start-service
* Cleanup
* Lint
* Updating state for remaining time
* Removed duration from cancel method
* Renamed service to fix disabled lint
* Some tests (incomplete)
* Relocated service descriptions
* Addressed requested changes
* Adjusted tests, added methods and events
* Added test for finish service, lint
* Code cleanp, using string states
* tzzz... one char...
* Proper usage of restore_state
* Some more cleanup
