Use #[derive(Default)] instead of implementing it on manually

This feature has been stabilized as of 1.62
rust-lang/rust#94457

src/types.rs

@@ -9,20 +9,17 @@ pub enum AspectFull<'a> {
     Song(&'a Song),
 }
 
+// you can derive Default in Rust 1.62 https://github.com/rust-lang/rust/pull/94457/
+#[derive(Default)]
 pub enum Aspect {
     Artists,
     Albums,
+    // bc Rust still doesn't have default argument values
+    // https://www.reddit.com/r/rust/comments/fi6nov/why_does_rust_not_support_default_arguments/fkfezxv/
+    #[default]
     Songs,
 }
 
-// bc Rust still doesn't have default argument values
-// https://www.reddit.com/r/rust/comments/fi6nov/why_does_rust_not_support_default_arguments/fkfezxv/
-impl Default for Aspect {
-    fn default() -> Self {
-        Aspect::Songs
-    }
-}
-
 pub trait Music: Display {}
 
 #[derive(PartialEq, Eq, Hash, Debug, Clone)]