Update dependencies

src/dbus/gnome_shell_introspect.rs

@@ -1,5 +1,3 @@
-#![allow(deprecated)] // Maybe De/SerializeDict will be undeprecated in the future.
-
 use std::collections::HashMap;
 
 use zbus::fdo::{self, RequestNameFlags};

src/dbus/mutter_screen_cast.rs

@@ -1,5 +1,3 @@
-#![allow(deprecated)] // Maybe De/SerializeDict will be undeprecated in the future.
-
 use std::collections::HashMap;
 use std::mem;
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};