Added ability to specify a specific Liftmaster door
Added ability to specify a specific Liftmaster door

Current version operates the "first door found". For users with multiple doors, this allows them to specify a specific door with the 'requiredDeviceId' option in config.

nfarina/homebridge,travisdoyle/homebridge,hachidorii/homebridge,SphtKr/homebridge,patricks/homebridge,inonprince/homebridge,chrisi21/homebridge,felixekman/homebridge,bivab/homebridge,cdcrowell/homekit,nfarina/homebridge-legacy-plugins,EddyK69/homebridge,derekforeman/homebridge,nmelo/homebridge,paigetech/homebridge,neonightmare/homebridge,snowdd1/homebridge,jmtatsch/homebridge,benjie/homebridge,lukeredpath/homebridge,dwery/homebridge,nfarina/homebridge,dotsam/homebridge,marsman12019/homebridge,DTTerastar/homebridge,ihexley/homebridge,ilcato/homebridge,alistairg/homebridge,hplato/homebridge,domotico/homebridge,suhajdab/homebridge,EmuxEvans/homebridge,Cosmo/homebridge,dvinc/homebridge,thkl/homebridge