Function oklab_round

crates/chromashift/src/round.rs:101–104

()

	#[test]
	fn oklab_round() {
		let rounded = Oklab::new(0.44027179, 0.08817676, -0.13386435, 100.0).round();
		assert_eq!(rounded, Oklab::new(0.44, 0.088, -0.134, 100.0));
	}

	#[test]
	fn lab_round() {