Add 0.3.1 release to changelog.

CHANGELOG.md

@@ -9,6 +9,12 @@ 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
 
+## [0.3.1] - 2019-01-29
+
+### Changed
+
+- Bumped to Iago v0.3.0
+
 ## [0.3.0] - 2019-01-20
 
 ### Added
@@ -45,7 +51,8 @@ The format is based on [Keep a Changelog], and this project adheres to
 [0.1.1]: https://github.com/dogmatiq/dapper/releases/tag/v0.1.1
 [0.1.0]: https://github.com/dogmatiq/dapper/releases/tag/v0.1.0
 [0.2.0]: https://github.com/dogmatiq/dapper/releases/tag/v0.2.0
-[0.3.0]: https://github.com/dogmatiq/dapper/releases/tag/v0.2.0
+[0.3.0]: https://github.com/dogmatiq/dapper/releases/tag/v0.3.0
+[0.3.1]: https://github.com/dogmatiq/dapper/releases/tag/v0.3.1
 
 [Iago]: https://github.com/dogmatiq/iago