async-iter-ext 0.3.0

Async iterator methods and async methods for option and result.
Documentation 
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use std::time::Duration;

use async_iter_ext::AsyncIterTools;
use async_std::task::sleep;

#[rstest::rstest]
async fn test_for_each_async_mut() {
    let items = [1, 2, 3, 4];

    let mut mut_items = items;
    mut_items
        .iter_mut()
        .for_each_async(|item| async move {
            sleep(Duration::from_millis(100)).await;
            *item += 3;
        })
        .await;

    assert_eq!(mut_items.len(), items.len());
    assert_eq!(mut_items, [4, 5, 6, 7]);
}