v0.4.9

• Avoid reallocations in Slab::clone_from (#137)

v0.4.8

• Fixed documentation about overflow (#124)
• Document panic in get2_mut (#131)
• Refactoring (#129, #132)

v0.4.7

• Use #[track_caller] on Rust 1.46+ (#119)
• Make Slab::new const on Rust 1.39+ (#119)

v0.4.6

• Add Slab::vacant_key (#114)
• Fix stacked borrows violation in Slab::get2_unchecked_mut (#115)

v0.4.5

• Add alternate debug output for listing items in the slab (#108)
• Fix typo in debug output of IntoIter (#109)
• Impl 'Clone' for 'Iter' (#110)

v0.4.4

• Fix panic in FromIterator impl (#102)
• Fix compatibility with older clippy versions (#104)
• Add try_remove method (#89)
• Implement ExactSizeIterator and FusedIterator for iterators (#92)