Bug: Incorrect flag set

[simlu]

The following

self._flag(0x83, 3, <BOOL>)

needs to be changes to

self._flag(0x83, 2, <BOOL>)

This is because 0x04 is actually 0100 in binary and the _flag is zero indexed for the bit.

Occurrences that need to be changes are:

https://github.com/uceeatz/VL53L0X/blob/master/VL53L0X.py#L334
https://github.com/uceeatz/VL53L0X/blob/master/VL53L0X.py#L358