mkswap in pure Rust

Initialize a swap device or file in Rust.

For example:

rust use std::io::Cursor;

use mkswap::SwapWriter;

let mut buffer: Cursor> = Cursor::new(vec![0; 40 * 1024]); let size = SwapWriter::new() .label("🔀".into()) .unwrap() .write(&mut buffer) .unwrap();

```