Update commands to be in line with current Python Inky

[lawik]

A bunch of magical numbers, voltages and stuff have been changed.

Example, the stuff sent for the yellow display specifics has been changed:
pimoroni/inky@8165ca0

So we should get up to scratch with that.

[nyaray]

Does this include #9?

[lawik]

It could. But it doesn't have to. I think #9 would be worth doing on its own, has some additional requirements (reading the EEPROM iirc). So I'd say keeping them separate makes things easier.

This could probably just be a straight pass to adjust our numbers to be in line with the tweaks they seem to have made. From what I've seen, some things like yellow color temperature by passing different stuff for the yellow-specific commands seem to have been changed.

[nyaray]

Sounds good, agreed.