Enhancements:
- Support Balance for stereo pairs and for Sonos Connect, see #64;
- Support TV for Sonos Amp, see #8.
- Test if home theatre system can be detected automatically. Please report if you see a warning like
[3/10/2019, 3:33:36 PM] [Sonos] Living Room Sonos: warning: TV detection fails for ZPS9: tv: false, zp.tv: true
Bump dependencies:
- NodeJS v10.15.3 LTS;
- homebridge-lib v4.0.10.