Incompatibility to NodeJS > 9.9.0
I tried to upgrade my NodeJS from 9.9.0 to 12.16.2 but the rebuild after fails due to the node_module bluetooth-hci-socket in the homebridge-bluetooth folder. 
There is a workaround to accomplish the upgrade for the default /usr/local/lib/node_modules/bluetooth-hci-socket. Maybe this is adaptable to the bluetooth-hci-socket of the homebridge-bluetooth plugin?