Getting list of devices in range

[gfwilliams]

Hi! Thanks for this library! I'm looking into replacing @abandonware/noble in my projects as it seems it's broken yet again on new Linux distros.

However, on Noble we could get called whenever an advertisement is received, but with node-ble I get a list of 75 devices, only maybe 3 of which are currently within range and connectable (much like I see in my OS Bluetooth menu). I tried .getRSSI but this fails with a DBusError: No such property 'RSSI' error.

Is there any way of getting a list of devices in range (or filtering the current list)?