Update libinput version to 1.31

[PolyMeilex]

Draft, as we need safe wrappers for those changes:

Changes in 1.31:

// Added items to the public API
// =============================
+pub const input_sys::libinput_switch_LIBINPUT_SWITCH_KEYPAD_SLIDE: input_sys::libinput_switch
+pub unsafe c fn input_sys::libinput_device_config_dwt_get_default_timeout(device: *mut input_sys::libinput_device) -> u32
+pub unsafe c fn input_sys::libinput_device_config_dwt_get_timeout(device: *mut input_sys::libinput_device) -> u32
+pub unsafe c fn input_sys::libinput_device_config_dwt_set_timeout(device: *mut input_sys::libinput_device, millis: u32) -> input_sys::libinput_config_status
+pub unsafe c fn input_sys::libinput_device_config_dwtp_get_default_timeout(device: *mut input_sys::libinput_device) -> u32
+pub unsafe c fn input_sys::libinput_device_config_dwtp_get_timeout(device: *mut input_sys::libinput_device) -> u32
+pub unsafe c fn input_sys::libinput_device_config_dwtp_set_timeout(device: *mut input_sys::libinput_device, millis: u32) -> input_sys::libinput_config_status
+pub unsafe c fn input_sys::libinput_tablet_tool_get_name(tool: *mut input_sys::libinput_tablet_tool) -> *const std::os::raw::c_char