Allow println in arti-testing.

#![deny(clippy::unnecessary_wraps)]

#![warn(clippy::unseparated_literal_suffix)]

#![deny(clippy::unwrap_used)]

#![allow(clippy::print_stderr)] // Allowed in this crate only.

#![allow(clippy::print_stdout)] // Allowed in this crate only.

mod config;

mod rt;