normalize edition to 2024

Signed-off-by: Ava Affine <ava@sunnypup.io>

mycelium/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "mycelium"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 num = { version = "0.4.3", features = ["alloc"] }

mycelium/src/lexer.rs

@@ -187,7 +187,7 @@ impl Iterator for Lexer {
         }
 
         let res = self.seek_next_token();
-        if let Err(ref e) = res {
+        if let Err(e) = &res {
             self.has_error_state = Some(e.clone());
         }
 
@@ -617,7 +617,7 @@ impl Lexer {
         }
 
         if let Some(ref res) = output {
-            if let Err(ref e) = res {
+            if let Err(e) = &res {
                 self.has_error_state = Some(e.clone());
             }
         }

mycelium/src/lib.rs

@@ -16,7 +16,6 @@
  */
 
 #![cfg_attr(not(test), no_std)]
-#![feature(let_chains)]
 #![feature(iter_collect_into)]
 #![feature(if_let_guard)]
 #![feature(core_float_math)]