Update rust (#93)

Reviewed-on: #93
Co-authored-by: phoenix <mail@kundeng.us>
Co-committed-by: phoenix <mail@kundeng.us>

src/coverart.rs

@@ -1,6 +1,6 @@
 use std::io::Write;
 
-use rand::Rng;
+use rand::RngExt;
 
 const FILENAME_LENGTH: i32 = 16;
 

src/song.rs

@@ -1,6 +1,6 @@
 use std::io::Write;
 
-use rand::Rng;
+use rand::RngExt;
 use serde::{Deserialize, Serialize};
 
 use crate::constants;