Added

• Re-export actix_rt::main macro as actix::main. #448
• Added actix::fut::Either::{left, right}() variant constructors. #453

Changed

• The re-exported actix-derive macros are now conditionally included with the derive feature which is enabled by default but can be switched off to reduce dependencies. #424
• The where clause on Response::fut() was relaxed to no longer require T: Unpin, allowing a Response to be created with an async block #421
• Allow creating WeakRecipient from WeakAddr, similiar to Recipient from Addr. #432
• Send SyncArbiter to current System's Arbiter and run it as future there. Enables nested SyncArbiters. #439
• Use generic type instead of associate type for EnvelopeProxy. #445
• SyncEnvelopeProxy and SyncContextEnvelope are no longer bound to an Actor. #445
• Rename actix::clock::{delay_for, delay_until, Delay} to {sleep, sleep_until, Sleep}. #443
• Remove all Unpin requirement from ActorStream. #443
• Update examples and tests according to the change of actix-rt. Arbiter::spawn and actix_rt::spawn now panic outside the context of actix::System. They must be called inside System::run, SystemRunner::run or SystemRunner::block_on. More information can be found here. #447
• actix::fut::Either's internal variants' representation has changed to struct fields. #453
• Replace pin_project with pin_project_lite #453
• Update crossbeam-channel to 0.5
• Update bytes to 1. #443
• Update tokio to 1. #443
• Update tokio-util tp 0.6. #443

Fixed

• Unified MessageResponse impl (combine separate Item/Error type, migrate to Item=Result). #446
• Fix error for build with --no-default-features flag, add sink feature for futures-util dependency. #427

Removed

• Remove unnecessary actix::clock::Duration re-export of std::time::Duration. #443