* Add tests for states of the sensors
* Revert async_update method
* Tests improvement
* Fix icon name
* Tests improvement
* Simplify tests
* Test improvement
* Patch the library instead of the coordinator
* Suggested change
* Remove return_value
* Add and use time related constants
* Sort time constants and reuse them in data rate constants
* Fix greeneyemonitor import
* Fix greeneyemonitor import V2
* Fix failing here_travel_time test
* Add TIME_MONTHS and TIME_YEARS
* Use TIME_MINUTES in opentherm_gw and isy994
* Add and use TIME_MILLISECONDS
* Change inconsistent ones
* Add TIME_MICROSECONDS and TIME_WEEKS
* Use constants in apcupsd and travisci
* Fix import error in upnp sensor.py
* Fix isy994 sensor.py using TIME_YEARS
* Fix dyson tests
* Use TIME_SECONDS in more places
* Use TIME_DAYS in google wifi