ClimateControl recently passed 50 million downloads (as of March 2021) and has been stable for a number of years; now's the time to cut an official 1.0 release (we probably could've done it years ago, but here we are).
The API has consistently been stable; there have been no changes between the previous 0.2.0 release and the 1.0.0 release, only documentation changes, dependency updates, and formatting changes.