libwacom: update to 2.18.0

libwacom: update to 2.18.0

Changes since 2.16.1:

2.18.0:
 - New Devices:
   - XP-Pen Deco MW (bluetooth), Deco02
   - Huion Kamvas Pro 19
   - Lenovo ThinkVision M14t Gen 2
 - New API: libwacom_stylus_is_generic() returns true for generic
   styli that are added by libwacom.

2.17.0:
 - New Devices:
   - Dell Inspiron 14 7445 2-in-1
   - Wacom One 14
   - Huion Kamvas 13 (Gen 3), Kamvas 16 (Gen 3)
   - Waltop Batteryless Tablet
   - XP-Pen Deco Pro LW (Gen 2)
   - Wacom styli IDs updated and aliased in preparation for
     upcoming kernel changes.

Link: https://github.com/linuxwacom/libwacom/blob/libwacom-2.18.0/NEWS
Signed-off-by: Daniel Golle <redacted>