Bump version to v0.2.2.

CHANGELOG.md

@@ -10,6 +10,12 @@ The format is based on [Keep a Changelog], and this project adheres to
 [Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
 [Semantic Versioning]: https://semver.org/spec/v2.0.0.html
 
+## [0.2.2] - 2024-05-15
+
+### Fixed
+
+- Generate code for nested message and enum types.
+
 ## [0.2.1] - 2024-04-23
 
 ### Added
@@ -84,6 +90,7 @@ The format is based on [Keep a Changelog], and this project adheres to
 [0.1.5]: https://github.com/dogmatiq/primo/releases/tag/v0.1.5
 [0.2.0]: https://github.com/dogmatiq/primo/releases/tag/v0.2.0
 [0.2.1]: https://github.com/dogmatiq/primo/releases/tag/v0.2.1
+[0.2.2]: https://github.com/dogmatiq/primo/releases/tag/v0.2.2
 
 <!-- version template
 ## [0.0.1] - YYYY-MM-DD