Update changelog for 0.2.0

Author: ocean90

CHANGELOG.md

@@ -4,16 +4,21 @@ 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]
+## [0.2.0] - 2022-03-11
 
 ### Changed
 * Bump required PHP version to 7.4.
 * Allow the `show_in_rest` argument in `TermMeta` and `PostMeta` to return an array for complex meta values.
 
-## 0.1.0 - 2021-05-20
+### Fixed
+* Add missing types for class constants.
+* Fix incorrect namespace for interfaces.
+
+## [0.1.0] - 2021-05-20
 
 ### Added
 * Initial version.
 
-[Unreleased]: https://github.com/wearerequired/common-php/compare/0.1.0...HEAD
+[Unreleased]: https://github.com/wearerequired/common-php/compare/0.2.0...HEAD
+[0.2.0]: https://github.com/wearerequired/common-php/compare/0.1.0...0.2.0
 [0.1.0]: https://github.com/wearerequired/common-php/compare/e3f7c76dd7579fec490b4fd0553629fc2159e4f2...0.1.0