Add ValueError to start_range_continuous()

[tekktrik]

Refactors start_range_continuous() and also adds throwing ValueError if out of range. Not sure why the period couldn't be set specifically between 2.25 and 2.54 seconds, but that was also removed and can now be done (in the 10 ms intervals)

Also updates the documentation to add more information on the delay behavior.

[FoamyGuy]

Change looks good to me. I don't have the specific hardware for testing.

@tekktrik did you run this with the sensor?

[tekktrik]

I don't think I did but I can.

Looking at this again I suspect the faulty range was a typo. I'll comment here once it's tested, at some point today if I can find the sensor if I can't find it now.

[tekktrik]

Just kidding, can't find it, whoops

[tekktrik]

Revisiting, I haven't forgotten about this. Though I do seem to have forgotten where I put my sensor haha. Pretty sure the original was a typo but worst case I'll order another sensor.

[JonasSchatz]

Can confirm, it was a typo 🥲
Code originated from the C++ version of this library: https://github.com/adafruit/Adafruit_VL6180X/blob/master/Adafruit_VL6180X.cpp

[tekktrik]

@FoamyGuy is this good to merge? Didn't know if your approval was contingent on test.

[FoamyGuy]

@tekktrik it would be best to test if we can. I've got one of these sensors now. I'll test it this week

[FoamyGuy]

I tested successfully with a PyPortal Titano connected with a stemma cable to the VL6180.