Issue in Readme: Scanner vs Sensor

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I tried following the docs after installing my ANT+ stick via Zadig.

I tried to call sensor.scan() as descripted in the README.

But i kept running into this error:
FATAL ERROR: Error::Error napi_create_reference

I had a look, and it looks like you have to create a HeartRateScanner if you want to scan for devices.

A HeartRateSensor, if you want to attach a device.

This is not clear in the README.

(please correct me if i am wrong)