What's Changed

Changelog: https://github.com/amethyst/specs/blob/master/CHANGELOG.md#0200-2023-09-24

Full Changelog: v0.19.0...v0.20.0

What's Changed

• Bump MSRV to 1.65.0 (#766)
• Added index where entity deletion stopped to the error returned from WorldExt::delete_entities (#766)
• Fix bug where deleting an entity with the wrong generation could clear the components of an existing entity. (#766)
• Bump shred to version 0.14.1, MSRV to 1.60.0 (shred changelog, #756)

Full Changelog: v0.18.0...v0.19.0

• Increase minumum rustc version to 1.56.1 because of shred and hashbrown dependencies (#748)

• Deprecate error::NoError in favor of std::convert::Infallible ([#688])
• Use #[non_exhaustive] for error::Error. Note this bumps the minimum supported rust version to 1.40 ([#688]).
• Add the derive feature that enables all derive-related smaller features
  (specs-derive and shred-derive currently).

• JoinIter now implements Clone when inner types are Clone -- usually for immutable join()s. (#620)
• Bump hibitset to 0.6.3. (#620)
• StorageEntry::replace replaces a component, returning the previous value if any. (#622)

• Update syn, quote and proc-macro2 to 1.0. (#648)
• Implement ParJoin for MaybeJoin if the inner type is ParJoin. (#655)
• Remove "nightly" feature -- improved panic messages are available on stable. (#671)
• Bump shred to 0.10.2. (#671, #674, #683)
• Components and resources no longer need to be Send + Sync if parallel feature is disabled (#673, #674)
• Bump uuid to 0.8.1. (#683)
• Bump rayon to 1.3.0. (#683)

• Benchmark uses nalgebra instead of cgmath. (#619).
• Bumped shrev from 1.0 to 1.1. (#619).
• Update hashbrown to 0.6.0, criterion to 0.3 (#627, #632)
• Remove mopa in favour of std::any::Any (#631)

• Moved World to shred, added WorldExt trait for Specs functionality (#550)
• Add UuidMarker for UUID <-> Entity mappings (#584)
• Implement Join on BitSetLike trait object (#599)
• Expose inner field of AntiStorage (#603)
• Remove fnv in favour of hashbrown (#606)
• Reexport hibitset, rayon, shred and shrev (#606)
• Reexport shred_derive::SystemData when shred-derive feature is enabled (#606)
• Reexport specs_derive::{Component, ConvertSaveload} when specs-derive feature is enabled
  (#606)