Update changelog

Author: ocean90

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [4.0.0] - 2022-12-08
 
 ### Changed
 * JS: Increase minimum peer dependency of `@wordpress/eslint-plugin` from 10 to 13.
@@ -154,7 +154,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * [VariableAnalysis](https://github.com/sirbrillig/phpcs-variable-analysis) for problematic variable use.
 * [Slevomat Coding Standard](https://github.com/slevomat/coding-standard) for PHP >=7 development.
 
-[Unreleased]: https://github.com/wearerequired/coding-standards/compare/3.0.0...HEAD
+[Unreleased]: https://github.com/wearerequired/coding-standards/compare/4.0.0...HEAD
+[4.0.0]: https://github.com/wearerequired/coding-standards/compare/3.0.0...4.0.0
 [3.0.0]: https://github.com/wearerequired/coding-standards/compare/2.2.0...3.0.0
 [2.2.0]: https://github.com/wearerequired/coding-standards/compare/2.1.0...2.2.0
 [2.1.0]: https://github.com/wearerequired/coding-standards/compare/2.0.0...2.1.0