Adafruit-circuitpython-si1145

Add UV indexing functionality

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

To use in CPython, `pip3 install adafruit-circuitpython-si1145`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si1145/en/latest/) for info on how to use it.

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

To use in CPython, `pip3 install adafruit-circuitpython-si1145`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si1145/en/latest/) for info on how to use it.

Fixed the Adafruit Discord badge image in the README. No functional changes were made to this library since the last release.

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

To use in CPython, `pip3 install adafruit-circuitpython-si1145`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si1145/en/latest/) for info on how to use it.

Added product link to the documentation. No functional changes were made since the last release.

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

To use in CPython, `pip3 install adafruit-circuitpython-si1145`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si1145/en/latest/) for info on how to use it.

Initial release with basic functionality in place.