Update requirements-dev.txt
Update requirements-dev.txt

added pre-commit as it wasn't installed resulting in error when following learn guide: https://learn.adafruit.com/building-circuitpython/build-circuitpython

adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython