The changelog for parking_lot 0.12 can be found here:
- The MSRV is bumped to 1.49.0.
- Disabled eventual fairness on wasm32-unknown-unknown. (#302)
- Added a rwlock method to report if lock is held exclusively. (#303)
- Use new asm! macro. (#304)
- Use windows-rs instead of winapi for faster builds. (#311)
- Moved hardware lock elision support to a separate Cargo feature. (#313)
- Removed used of deprecated spin_loop_hint. (#314)
The changelog for parking_lot 0.12 can be found here: