v7.0.0-rc1

NOTE: This is a release candidate and does not fall under semantic versioning guarantees.
It is intended to permit early access via crates.io, testing and discussing about desired changes in a future stable release.

Changelog:

• 0198c59 Merge pull request #331 from tfreiberg-fastly/tfreiberg/entry-ref
• 95e3cc6 Replace once_cell::sync::OnceCell with std::sync::OnceLock
• fca0bd1 Update incorrent sentence on MSRV lag.
• 0c50616 Update special thanks section
• 9a80e95 Rename inline feature to inline-more
• d643213 Use equivalent instead of Borrow for key equality checks.
• 8518023 chore update msrv to 1.70
• 0ecf5e9 chore: update deps
• 65642cb Comment no longer relevant thanks to extensive cleanup efforts
• d65d86c fix downgrade (#329)
• 9b74a37 feat: crate feature named all that enables all features except inline
• 340cdc4 Set readme contents as crate docs (#312)
• 7fc178d chore: cargo fmt
• 55f7cdf misc unsafe removals (#325)
• 54710a6 Merge branch 'hashbrown-0.15' (324)
• 7fb4eb4 Merge branch 'conradludgate-rwlock-detached' (#323)
• c8c936c remove SharedValue (#322)
• 46005cb upgrade to hashbrown 0.15 with HashTable API
• 22bd6af fix newly introduced clippy lints
• a0df3a1 fix send/sync bounds via GuardSend and auto traits
• 613b6b7 add detached guards to iterators
• d2b5073 switch to using detached guards
• 9535936 introduce detached guard abstraction
• 39864b2 Avoid overallocating or growing Vec in Clone (#295)
• 387a8b7 remove SharedValue