Adafruit-circuitpython-bmp280

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-bmp280`.

Read the [docs](http://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

Removed frozenset because it was causing an issue with non-express boards such as the Trinket M0

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-bmp280`.

Read the [docs](http://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

Adopted some of the improvements from the BME280 library. Thanks jraber.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-bmp280`.

Read the [docs](http://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-bmp280`.

Read the [docs](http://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-bmp280`.

Read the [docs](http://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

Fixes requirements.txt and sets the pylint version to 1.9.2.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Addafruit_CircuitPython_Bundle).

Read the [docs](https://circuitpython.readthedocs.io/projects/bmp280/en/latest/) for info on how to use it.

To install from PyPI on a Linux system, use:

sh
sudo pip3 install adafruit-circuitpython-bmp280