libinput: update to 1.31.1

libinput: update to 1.31.1

Update from 1.28.1, spanning the 1.29.x, 1.30.x and 1.31.x release
series.

Highlights:
 * 1.31.0: New 'high-resolution scroll' API and per-device button
   debouncing improvements; tablet pad mode support reworked.
 * 1.30.0: Added support for new touchpad and tablet device quirks;
   improved gesture detection on multi-touch devices.
 * 1.29.0: New configuration knobs for trackpoint acceleration and
   improved palm detection.
 * Continuous bug fixes and updated device quirks throughout.

Link: https://gitlab.freedesktop.org/libinput/libinput/-/tags/1.31.1
Link: https://wayland.freedesktop.org/libinput/doc/latest/
Signed-off-by: Daniel Golle <redacted>