v1.6.0

Added

• Added task::spawn_local. (#757)
• Added out of the box support for wasm. (#757)
• Added JoinHandle::cancel (#757)
• Added sync::Condvar (#369)
• Added sync::Sender::try_send and sync::Receiver::try_recv (#585)
• Added no_std support for task, future and stream (#680)
• Added an environment variable to configure the thread pool size of the runtime. (#774)
• Implement Clone for UnixStream (#772)

Changed

• Switched underlying runtime to smol. (#757)
• Switched implementation of sync::Barrier to use sync::Condvar like std does. (#581)
• For wasm, switched underlying Timer implementation to futures-timer. (#776)

Fixed

• Use smol::block_on to handle drop of File, avoiding nested executor panic. (#768)
• Allow compilation on 32 bit targets, by using AtomicUsize for TaskId. (#756)