Conflicts with FastAccelStepper

[dcaud]

I'm having the same problem discussed here. https://github.com/gin66/FastAccelStepper/issues/17#issuecomment-743807832

The author of fastAccelStepper says that "ESP32Encoder author should not take over the PCNT-module interrupt."

I see some earlier issues here mentioned this, but this is causing me a problem with the lastest commit of ESP32Encoder.

Thanks!