Changes: https://github.com/adafruit/Adafruit_CircuitPython_BLE_Heart_Rate/compare/1.1.17...1.1.18
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-ble-heart-rate`.
Read the [docs](https://circuitpython.readthedocs.io/projects/ble-heart-rate/en/latest/) for info on how to use it.