chore: release v0.4.0 (#9)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

CHANGELOG.md

@@ -6,6 +6,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.1](https://github.com/zetanumbers/scope-lock/compare/v0.3.0...v0.3.1) - 2025-05-19
+
+### Fixed
+
+- reimplement extended reference tracking using std
+
+### Other
+
+- allow documentation hidding for a minor update
+- hide leftover legacy code
+- Revert "docs: deprecate and hide docs on leftover legacy code"
+- restore Unpin impls in leftover legacy code
+- relax MIRI restrictions, add tree borrows and run 8 random seeds
+- deprecate and hide docs on leftover legacy code
+
 ## [0.3.0](https://github.com/zetanumbers/scope-lock/compare/v0.2.5...v0.3.0) - 2025-05-15
 
 ### Added

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "scope-lock"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2024"
 # TODO: elaborate
 description = "Safely extend lifetimes"