Bangle.js 2: Bluetooth Long Range

I've seen some slight difference indoors, one more wall/few meters more works with RSSI over 100.

So for now advertising over coded phy should work and I think there is no way to improve range more in software.

However there are some other missing features see https://github.com/espruino/Espruino/issues/2465

• connections over coded phy do not work
  
• extended advertising - advertise more data than 31 bytes (there is no scan response possible over coded phy so less data fits - only 31 instead of 31+31)
  for both SD140 6.1.x is needed