async-once-cell 0.5.4

Async single assignment cells and lazy values.
Documentation 
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[![Crates.io](https://img.shields.io/crates/v/async_once_cell.svg)](https://crates.io/crates/async-once-cell)
[![API reference](https://docs.rs/async-once-cell/badge.svg)](https://docs.rs/async-once-cell/)

# Overview

`async_once_cell` is a version of [once_cell](https://crates.io/crates/once_cell)
that adds support for async initialization of cells. The short version of the
API is:

```rust
impl OnceCell<T> {
    fn new() -> OnceCell<T>;
    fn get(&self) -> Option<&T>;
    async fn get_or_init(&self, init: impl Future<Output=T>) -> &T;
}
```

More patterns and use-cases are in the [docs](https://docs.rs/async-once-cell/)!