1.8.0 (July 2, 2021)

Added

• io: add get_{ref,mut} methods to AsyncFdReadyGuard and AsyncFdReadyMutGuard (#3807)
• io: efficient implementation of vectored writes for BufWriter (#3163)
• net: add ready/try methods to NamedPipe{Client,Server} (#3866, #3899)
• sync: add watch::Receiver::borrow_and_update (#3813)
• sync: implement From<T> for OnceCell<T> (#3877)
• time: allow users to specify Interval behaviour when delayed (#3721)

Added (unstable)

• rt: add tokio::task::Builder (#3881)

Fixed

• net: handle HUP event with UnixStream (#3898)

Documented

• doc: document cancellation safety (#3900)
• time: add wait alias to sleep (#3897)
• time: document auto-advancing behaviour of runtime (#3763)