Implement functions to get and set 'region of interest' similar to its reference implementation in C: https://github.com/pololu/vl53l1x-arduino/commit/a6de3966784aa07680bb35a1f9ac369959efe19f Signed-off-by: Oliver Stäbler <oliver.staebler@bytesatwork.ch>
Signed-off-by: Ron Evans <ron@hybridgroup.com>