fix: import std::io for undeclared crate or module io

src/compression/program.rs

@@ -6,6 +6,7 @@ use std::path::PathBuf;
 use std::env;
 use std::fs;
 use std::os::unix::fs::PermissionsExt;
+use std::io;
 use log::*;
 
 use crate::compression::CompressionEngine;