Add PNM support and fix for 4.0.0
- Adds PNM support. Thanks to @matt-land, @crookedstorm and @Riddlerat
- Updated to work with CircuitPython 4.0.0. Thanks to @tannewt, @siehputz and @DavePutz
To use in CircuitPython, simply install the Adafruit CircuitPython bundle.
Read the docs for info on how to use it.