`atty` is unmaintained

The maintainer of `atty` has [published](https://github.com/softprops/atty/commit/5bfdbe9e48c6ca6a4909e8d5b04f5e843a257e93) an official notice that the crate is no longer
under development, and that users should instead rely on the functionality in the standard library's [`IsTerminal`](https://doc.rust-lang.org/std/io/trait.IsTerminal.html) trait.

## Alternative(s)

- [std::io::IsTerminal](https://doc.rust-lang.org/stable/std/io/trait.IsTerminal.html) - Stable since Rust 1.70.0 and the recommended replacement per the `atty` maintainer.
- [is-terminal](https://crates.io/crates/is-terminal) - Standalone crate supporting Rust older than 1.70.0