Update smithay to latest commit

Includes an implementation for `VirtualKeyboardHandler`, which is now
required.

src/wayland/handlers/virtual_keyboard.rs

@@ -1,6 +1,35 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 use crate::state::State;
-use smithay::delegate_virtual_keyboard_manager;
+use smithay::{
+    backend::input::KeyState,
+    delegate_virtual_keyboard_manager,
+    input::keyboard::{FilterResult, KeyboardHandle, Keycode, xkb::ModMask},
+    utils::SERIAL_COUNTER,
+    wayland::virtual_keyboard::VirtualKeyboardHandler,
+};
+
+impl VirtualKeyboardHandler for State {
+    fn on_keyboard_event(
+        &mut self,
+        keycode: Keycode,
+        state: KeyState,
+        time: u32,
+        keyboard: KeyboardHandle<Self>,
+    ) {
+        let serial = SERIAL_COUNTER.next_serial();
+        keyboard.input(self, keycode, state, serial, time, |_, _, _| {
+            FilterResult::Forward::<bool>
+        });
+    }
+    fn on_keyboard_modifiers(
+        &mut self,
+        _depressed_mods: ModMask,
+        _latched_mods: ModMask,
+        _locked_mods: ModMask,
+        _keyboard: KeyboardHandle<Self>,
+    ) {
+    }
+}
 
 delegate_virtual_keyboard_manager!(State);