Prepare to release 2.2.0

CHANGELOG.md

@@ -6,6 +6,8 @@ Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) princi
 
 ## [Unreleased][unreleased]
 
+## [2.2.0] - 2022-01-22
+
 ### Added
 
  - Added new `ConverterInterface`
@@ -383,7 +385,8 @@ No changes were introduced since the previous release.
     - Alternative 1: Use `CommonMarkConverter` or `GithubFlavoredMarkdownConverter` if you don't need to customize the environment
     - Alternative 2: Instantiate a new `Environment` and add the necessary extensions yourself
 
-[unreleased]: https://github.com/thephpleague/commonmark/compare/2.1.1...main
+[unreleased]: https://github.com/thephpleague/commonmark/compare/2.2.0...main
+[2.2.0]: https://github.com/thephpleague/commonmark/compare/2.1.1...2.2.0
 [2.1.1]: https://github.com/thephpleague/commonmark/compare/2.0.2...2.1.1
 [2.1.0]: https://github.com/thephpleague/commonmark/compare/2.0.2...2.1.0
 [2.0.2]: https://github.com/thephpleague/commonmark/compare/2.0.1...2.0.2