feat(libarchive): added FileWritter, also apparently formatted sys

libarchive/src/read/entries.rs

@@ -2,7 +2,6 @@ use crate::archive::Entry;
 use crate::error::ArchiveError;
 use crate::read::Archive;
 use libarchive3_sys::ffi;
-use libc::{c_void, ssize_t};
 use std::io;
 use std::io::Read;
 use std::marker;

libarchive/src/read/mod.rs

@@ -31,7 +31,7 @@ pub trait Archive: Handle + Sized {
             3 => Some(ReadFilter::Compress),
             5 => Some(ReadFilter::Lzma),
             6 => Some(ReadFilter::Xz),
-            14 =>Some( ReadFilter::Zstd),
+            14 => Some(ReadFilter::Zstd),
             _ => None,
         }
     }