fixed PWM issue based on pull request from here: https://github.com/adafruit/Adafruit-Motor-HAT-Python-Library/pull/7 (permission received)
fixed PWM issue based on pull request from here: https://github.com/adafruit/Adafruit-Motor-HAT-Python-Library/pull/7 (permission received)

ferret-guy/adafruit_motor_hat