* Add type hints to broadlink device/heartbeat
* Improve
* Force bool
* Revert "Force bool"
This reverts commit 65bce837d0e9beb4eb5aff8c190b412969684d4a.
* Implement heartbeat in the Broadlink integration
* Rename INTERVAL to HEARTBEAT_INTERVAL
* Test that we log an error message when the heartbeat fails