• added: OptionalQuery extractor (#2310)
• added: TypedHeader which used to be in axum (#1850)
• breaking: Update to prost 0.12. Used for the Protobuf extractor
• breaking: Make tokio an optional dependency
• breaking: Upgrade cookie dependency to 0.18 (#2343)
• breaking: Functions and methods that previously accepted a Cookie
  now accept any T: Into<Cookie> (#2348)