`escape8259` performs RFC8259-compliant string escaping and un-escaping.
[RFC8259] is a JSON encoding standard. Many JSON encoders exist, but other
RFCs use the same string escaping mechanism, so it's useful to be able to
access the string escaping functions by themselves.
# Examples
```rust
use escape8259::{escape, unescape};
assert_eq!(unescape(r#"\u0041\n"#).unwrap(), "A\n");
let multiline = r#"hello
world"#;
assert_eq!(escape(multiline), r#"hello\n world"#);
```
[RFC8259]: https://tools.ietf.org/html/rfc8259