Add libinput-1.14 support
This libinput version adds a new tablet tool type.
otherwise the build fails like
[96/236] Compiling C object 'subprojects/wlroots/backend/86510e7@@wlr_backend@sta/libinput_tablet_tool.c.o'.
../subprojects/wlroots/backend/libinput/tablet_tool.c: In function ‘wlr_type_from_libinput_type’:
../subprojects/wlroots/backend/libinput/tablet_tool.c:101:2: warning: enumeration value ‘LIBINPUT_TABLET_TOOL_TYPE_TOTEM’ not handled in switch [-Wswitch]
switch (value) {
(cherry picked from commit 94f65e35)