conlang: Elide lifetimes (fixes clippy lint)

compiler/cl-typeck/src/source.rs

@@ -20,7 +20,7 @@ pub enum Source<'a> {
     Ty(&'a TyKind),
 }
 
-impl<'a> Source<'a> {
+impl Source<'_> {
     pub fn name(&self) -> Option<Sym> {
         match self {
             Source::Root => None,

compiler/cl-typeck/src/table.rs

@@ -268,7 +268,7 @@ impl<'a> Table<'a> {
     }
 }
 
-impl<'a> Default for Table<'a> {
+impl Default for Table<'_> {
     fn default() -> Self {
         Self::new()
     }