* Use bluetooth address as unique id for flic buttons.
* Always lower case address for uid and add tests.
* Update test to set up component.
* Use format_mac(addr) as unique id.
* Only patch pyflic objects and use query entity registry for buttons.
* Replace ExitStack with patch.multiple, remove assert_setup_component.
* Test binary sensor is present in state machine.
epenet
Tom Hennigan