Requesting support for Low Battery Warning
**Is your feature request related to a problem? Please describe:**
No specific problem other than warning in log that the context is not supported

**Describe the solution you'd like:**
Homebridge-myq doesn't seem capable of supporting the low battery warning as generated from the MyQ "add-on" kit.

The following message is displayed in the Homebridge log for this plug-in
[homebridge-myq] This plugin generated a warning from the characteristic 'Status Low Battery': Characteristic not in required or optional characteristic section for service GarageDoorOpener.

**Describe alternatives you've considered:**
Right now, home bridge just ignores the warning and I rely on the MyQ app to report the battery warnings.

**Additional context:**
n/a