Update README and CHANGELOG

CHANGELOG.md

@@ -6,6 +6,8 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [0.2.1] - 2022-05-23
+
 ### Added
 
 - Build [docs.rs] documentation with all features enabled for completeness.
@@ -65,7 +67,8 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 Initial release.
 
-[Unreleased]: https://github.com/bertptrs/tracing-mutex/compare/v0.2.0...HEAD
+[Unreleased]: https://github.com/bertptrs/tracing-mutex/compare/v0.2.1...HEAD
+[0.2.1]: https://github.com/bertptrs/tracing-mutex/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/bertptrs/tracing-mutex/compare/v0.1.2...v0.2.0
 [0.1.2]: https://github.com/bertptrs/tracing-mutex/compare/v0.1.1...v0.1.2
 [0.1.1]: https://github.com/bertptrs/tracing-mutex/compare/v0.1.0...v0.1.1

README.md

@@ -59,12 +59,23 @@ performance penalty in your production environment, this library also offers deb
 when debug assertions are enabled, and to `Mutex` when they are not. Similar helper types are
 available for other synchronization primitives.
 
+### Features
+
+- Dependency-tracking wrappers for all locking primitives
+- Optional opt-out for release mode code
+- Support for primitives from:
+  - `std::sync`
+  - `parking_lot`
+  - Any library that implements the `lock_api` traits
+
 ## Future improvements
 
 - Improve performance in lock tracing
 - Optional logging to make debugging easier
 - Better and configurable error handling when detecting cyclic dependencies
-- Support for other locking libraries, such as `parking_lot`
+- Support for other locking libraries
+- Support for async locking libraries
+- Support for `Send` mutex guards
 
 **Note:** `parking_lot` has already began work on its own deadlock detection mechanism, which works
 in a different way. Both can be complimentary.