chore: apply clippy suggestions

cosmic-config/src/lib.rs

@@ -229,7 +229,7 @@ impl Config {
 
     // Start a transaction (to set multiple configs at the same time)
     #[inline]
-    pub fn transaction(&self) -> ConfigTransaction {
+    pub fn transaction(&self) -> ConfigTransaction<'_> {
         ConfigTransaction {
             config: self,
             updates: Mutex::new(Vec::new()),

cosmic-config/src/subscription.rs

@@ -93,7 +93,7 @@ async fn start_listening<T: 'static + Send + Sync + PartialEq + Clone + CosmicCo
                 }
                 Err((errors, t)) => {
                     let update = crate::Update {
-                        errors: errors,
+                        errors,
                         keys: Vec::new(),
                         config: t.clone(),
                     };