chore: fix clippy lints from Rust nightly

crates/trippy-core/src/strategy.rs

@@ -1596,7 +1596,5 @@ mod state {
 
 /// Returns true if the duration between start and end is grater than a duration, false otherwise.
 fn exceeds(start: Option<SystemTime>, end: SystemTime, dur: Duration) -> bool {
-    start.map_or(false, |start| {
-        end.duration_since(start).unwrap_or_default() > dur
-    })
+    start.is_some_and(|start| end.duration_since(start).unwrap_or_default() > dur)
 }

crates/trippy-tui/src/frontend/binding.rs

@@ -101,9 +101,7 @@ pub struct KeyBinding {
 impl KeyBinding {
     pub fn check(&self, event: KeyEvent) -> bool {
         let code_match = match (event.code, self.code) {
-            (KeyCode::Char(c1), KeyCode::Char(c2)) => {
-                c1.to_ascii_lowercase() == c2.to_ascii_lowercase()
-            }
+            (KeyCode::Char(c1), KeyCode::Char(c2)) => c1.eq_ignore_ascii_case(&c2),
             (c1, c2) => c1 == c2,
         };
         code_match && self.modifiers == event.modifiers