tokio-util@0.7.9 depends on outdated hashbrown

[dignifiedquire]

tokio-util@0.7.9 depends currently on an outdated version of hashbrown@0.12, which in turn depends on ahash@0.7.6 which is yanked: https://github.com/tokio-rs/tokio/blob/master/tokio-util/Cargo.toml#L48

[Darksonn]

I'm happy to upgrade to hashbrown v0.14, but it doesn't seem like we force you to use a yanked version of ahash. Hashbrown v0.12.x is compatible with ahash 0.7.7, which is not yanked. Remember that cargo dependencies are caret-dependencies, and do not specify an exact version.

[dignifiedquire]

Thanks, 0.7.7 was not yet released when I filed this issue, so it makes it much less urgent.
I'll make a PR updating hashbrown in any case though.

[dignifiedquire]

Opened #6102