Adafruit-circuitpython-ad569x

- Parameter setting has been fixed.
- `dac` and `update_dac` have been removed for clarity.
- `adafruit_register` is no longer required.

This module works with the AD569x DACs over I2C.

To use in CircuitPython, download the .mpy file and copy it to the lib folder on the CIRCUITPY drive.

Read the [docs](https://adafruit-circuitpython-ad569x.readthedocs.io/en/latest/) for info on how to use it.