Update gtk-rs crates

Cargo.toml

@@ -6,9 +6,9 @@ edition = "2021"
 
 
 [dependencies]
-gtk = { package = "gtk4", version = "0.7", features= ["gnome_45"]}
+gtk = { package = "gtk4", version = "0.8", features= ["gnome_45"]}
 log = "0.4"
 gettext-rs = { version = "0.7", features = ["gettext-system"] }
-adw = {package = "libadwaita", version = "0.5"}
+adw = {package = "libadwaita", version = "0.6"}
 pretty_env_logger = "0.5"
 regex = "1.5"

src/application.rs

@@ -4,7 +4,8 @@ use gtk::{gio, glib};
 use crate::{config, widgets::Window};
 
 mod imp {
-    use glib::{once_cell::sync::OnceCell, WeakRef};
+    use glib::WeakRef;
+    use std::cell::OnceCell;
 
     use super::*;