Volume Control as a Slider doesn't work
First of all I'd like to thank you @merdok a lot for your effort, great plugin!

I just updated to version 2.0.0.; had to delete the old config and devices, but now I see the new device in the Home app. However, the volume slider doesn't work as supposed I guess:

- percentage changes do not change the volume
- 0% mutes the volume and any percentage after that switches the volume back on, but to the same volume as before
- changes made with the volume buttons work as expected and even change the percentage of the slider.

Actually I can't say, whether this is a new bug of V2.0. or just an old one that still exists as I haven't worked with the volume options before..