Update libinput version to 1.29

[PolyMeilex]

Changes in 1.29:

// Changed items in the public API
// ===============================
-pub unsafe c fn input_sys::libinput_config_accel_set_points(accel_config: *mut input_sys::libinput_config_accel, accel_type: input_sys::libinput_config_accel_type, step: f64, npoints: usize, points: *mut f64) -> input_sys::libinput_config_status
+pub unsafe c fn input_sys::libinput_config_accel_set_points(accel_config: *mut input_sys::libinput_config_accel, accel_type: input_sys::libinput_config_accel_type, step: f64, npoints: usize, points: *const f64) -> input_sys::libinput_config_status

// Added items to the public API
// =============================
+pub const input_sys::libinput_config_eraser_button_mode_LIBINPUT_CONFIG_ERASER_BUTTON_BUTTON: input_sys::libinput_config_eraser_button_mode
+pub const input_sys::libinput_config_eraser_button_mode_LIBINPUT_CONFIG_ERASER_BUTTON_DEFAULT: input_sys::libinput_config_eraser_button_mode
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_get_button(tool: *mut input_sys::libinput_tablet_tool) -> std::os::raw::c_uint
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_get_default_button(tool: *mut input_sys::libinput_tablet_tool) -> std::os::raw::c_uint
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_get_default_mode(tool: *mut input_sys::libinput_tablet_tool) -> input_sys::libinput_config_eraser_button_mode
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_get_mode(tool: *mut input_sys::libinput_tablet_tool) -> input_sys::libinput_config_eraser_button_mode
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_get_modes(tool: *mut input_sys::libinput_tablet_tool) -> u32
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_set_button(tool: *mut input_sys::libinput_tablet_tool, button: u32) -> input_sys::libinput_config_status
+pub unsafe c fn input_sys::libinput_tablet_tool_config_eraser_button_set_mode(tool: *mut input_sys::libinput_tablet_tool, mode: input_sys::libinput_config_eraser_button_mode) -> input_sys::libinput_config_status
+pub type input_sys::libinput_config_eraser_button_mode = std::os::raw::c_uint