How do you set the concurrency limit? I'm down to use your framework (thanks!), just curious how you implement it. I couldn't get Stream::buffered to work correctly.
You can use `Futures::StreamExt::buffer_unordered` for this. [1] is an example where I used it for benchmark which creates a certain amount of QUIC connections at a time.
But you can also spawn all tasks upfront via `tokio::spawn`, and let them wait on a `tokio::sync::Semaphore` before making the request. The drawback of this is that you might allocate more memory for tasks upfront - but if you don't have an extremely high number it might not matter.
