Hyper-util doesn't build for the web

[Mubelotix]

Building hyper-util with the tokio feature for wasm fails

cargo build --package hyper-util --target wasm32-unknown-unknown --features tokio

This is a shame because the code that makes it fail is probably not used by the majority of users. Would it be possible to create more specific features under the tokio feature? For example, my use case only needs TokioIo which works fine.

I'm willing to do it