Remove use of deprecated stop=False

[jepler]

Remove use of stop=False. This option is not supported in CircuitPython 6.x. https://github.com/adafruit/Adafruit_CircuitPython_MLX90393/blob/master/adafruit_mlx90393.py#L165

It looks like this will affect the setter of "gain", since it sends a payload of more than 1 byte. This property is unconditionally set in the constructor, so it may be the case that this driver cannot be used with 6.x until this is addressed.

[jepler]

See adafruit/Adafruit_CircuitPython_BusDevice#54

[ladyada]

@caternuson is this also resolved?

[caternuson]

Hmmm...maybe that's what lint was griping about. So, no. Not resolved. Forgot about this change. I'll PR this right quick....

[caternuson]

Fixed with #23