I shamelessly assumed the firmware version (chose the version that was included in the same Mi Fit version when bip started to support the new command)
This also improves firmware/RES probing to distinguish Mi Band 2/3 firmware files and Mi Band 3/Bip RES files.
Notes:
- Firmware flashing should might but is untested
- This basicall runs off the Amazfit Bip code which will probably incorrect (Mi Band 3 is proabably something between the Bip and the Mi Band 2)