Adafruit-circuitpython-htu21d

This release includes:
* Migrating this repository from Travis to GitHub Actions. This has no effect on the behavior of the code itself.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://circuitpython.org/libraries).

To use in CPython, `pip3 install adafruit-circuitpython-htu21d`.

Read the [docs](http://circuitpython.readthedocs.io/projects/htu21d/en/latest/) for info on how to use it.

Add `time.sleep()` to `__init__` to resolve issue with remote sensor I/O error.

Thanks to dherrada for the fix!

To use in CircuitPython, download the the [Adafruit CircuitPython bundle](https://circuitpython.org/libraries) and copy the correct .mpy file to the `lib` folder on your CIRCUITPY drive.

To use in CPython, `pip install adafruit-circuitpython-htu21d`.

Read the [docs](http://circuitpython.readthedocs.io/projects/htu21d/en/latest/) for info on how to use it.

To use in CircuitPython, download the .mpy file and copy it to the `lib` folder on the `CIRCUITPY` drive. Or, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip install adafruit-circuitpython-htu21d`.

Read the [docs](http://circuitpython.readthedocs.io/projects/htu21d/en/latest/) for info on how to use it.

Supports the Adafruit HTU21D-F temperature and humidity breakout

To use in CircuitPython, download the .mpy file and copy it to the `lib` folder on the `CIRCUITPY` drive. Or, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip install adafruit-circuitpython-htu21d`.

Read the [docs](http://circuitpython.readthedocs.io/projects/htu21d/en/latest/) for info on how to use it.