Support external pull ups?

[caternuson]

Library currently enables internal pull ups:

Adafruit_CircuitPython_MatrixKeypad/adafruit_matrixkeypad.py

Line 63 in 71feb81

pin.pull = Pull.UP

but not all boards have internal pulls.

FT2332H for example:
https://forums.adafruit.com/viewtopic.php?f=60&t=192604

[caternuson]

Could surround with try/except and just silently consume the exception? Sort of like "enable internal pulls if they exist".