Lowercasization of the Bluetooth Address

[ouinouin]

Hi, here is the pull request to force the bluetooth mac address sent back by the bluetooth processLeAdvertisingReport scan function to be in lower case.
( see noble/noble-device#30 )

[don]

toLowerCase() in this code doesn't do anything. The Buffer.toString('hex') returns lower case.

> b = new Buffer([15, 14, 13, 12, 11, 10])
<Buffer 0f 0e 0d 0c 0b 0a>
> b.toString('hex').match(/.{1,2}/g).reverse().join(':')
'0a:0b:0c:0d:0e:0f'