Update Changelog file

Author: shochdoerfer

CHANGELOG.md

@@ -2,6 +2,25 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
+## 0.22.0
+
+### Added
+- [#243](https://github.com/bitExpert/phpstan-magento/pull/243) Do not yet require PHPStan 1.7
+- [#242](https://github.com/bitExpert/phpstan-magento/pull/242) Add link to related blog post
+- [#239](https://github.com/bitExpert/phpstan-magento/pull/239) Update madewithlove/license-checker requirement from to ^1.2
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- Nothing.
+
 ## 0.21.0
 
 ### Added