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

src/compression/lz4.rs

@@ -2,6 +2,7 @@ use anyhow::Result;
 use std::fs::File;
 use std::io::{Read,Write};
 use std::path::PathBuf;
+use std::io;
 use log::*;
 
 use lz4_flex::frame::{FrameDecoder, FrameEncoder};

src/compression/none.rs

@@ -2,6 +2,7 @@ use anyhow::Result;
 use std::fs::File;
 use std::io::{Read,Write};
 use std::path::PathBuf;
+use std::io;
 use log::*;
 
 use crate::compression::CompressionEngine;

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;