If you use the `h1-client`, upgrading to this release is recommended.

- `h1-client-rustls` feature flag, for using the [`async-h1`](https://github.com/http-rs/async-h1) client with [`rustls`](https://github.com/ctz/rustls) as the TLS backend.
    - The TLS backend for `h1-client` is still `async-native-tls`.
- Per-request middleware, provided by `RequestBuilder::middleware(&mut self, impl Middleware)`.
- `AsRef<Headers>` and `AsMut<Headers>` for `surf::Request` and `surf::Response`.

- Relative redirects should now be handled by the `RedirectMiddleware`.
- The `h1-client` feature should now properly work with `http-client` 6.3.0+ without additional feature specification.

- The `http` docs now link to the live, up-to-date `http_types` docs.

- Various CI improvements.