Update changelog for 3.0.0

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]
+## [3.0.0] - 2022-02-11
 
 ### Added
 * CSS: Add SCSS preset for stylelint-config.
@@ -142,7 +142,8 @@ 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/2.2.0...HEAD
+[Unreleased]: https://github.com/wearerequired/coding-standards/compare/3.0.0...HEAD
+[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
 [2.0.0]: https://github.com/wearerequired/coding-standards/compare/1.6.0...2.0.0