By moving `block_on` to an auxiliary crate, we avoid having to keep a separate copy of it in every async test. (This also incorporates some small tweaks to the headers in `await_ready.rs`.)
By moving `block_on` to an auxiliary crate, we avoid having to keep a separate copy of it in every async test. (This also incorporates some small tweaks to the headers in `await_ready.rs`.)