• Fix compile failures when using quoted rtype (i.e., #[rtype("()")]) form.

• Add Registry::try_get() method.
• Add Registry::get_or_start_default() method.
• Deprecate Registry::get() method.
• Relax A: ArbiterService bound on Registry::query().
• Relax A: ArbiterService bound on Registry::set().

• Add AsyncContext::run_interval_at() method.

• No significant changes since 0.13.2.

• Expose ContextFut::restart.
• Unquoted types are now allowed in the #[rtype(result = TYPE)] position when type is a path.

• Update syn dependency to 2.

Added

• Add SyncArbiter::start_with_thread_builder().
• Derive PartialEq and Eq for MailboxError.
• Minimum supported Rust version (MSRV) is now 1.68.

Fixed

• Fix SinkWrite sometimes not sending all messages in its buffer.

• Fix at-least-once delivery guarantee for IssueAsync. #536

• Add support for actix v0.13.

Added

• Implement Clone for WeakRecipient. #518
• Implement From<Recipient> for WeakRecipient. #518
• Add Recipient::downgrade method for obtaining a WeakRecipient. #518
• Extend Sender trait with a downgrade method. #518

Changed

• Make WeakSender trait public rather than crate-public. #518
• Updated tokio-util dependency to 0.7. #???
• Updated minimum supported Rust version to 1.49.

Removed

• Remove Resolver actor. #451