Update Changelog for v0.2.0

Author: aaron-lane

CHANGELOG.md

@@ -6,7 +6,9 @@ The format is based on [Keep a Changelog][keepachangelog-site],
 and this project adheres to [Semantic Versioning][semver-site].
 
 
-## Unreleased
+## [Unreleased]
+
+## [0.2.0] - 2019-04-02
 
 ### Added
 
@@ -18,5 +20,8 @@ and this project adheres to [Semantic Versioning][semver-site].
 
 - Initial release
 
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/compare/v0.2.0...HEAD
+[0.2.0]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/compare/v0.1.0...v0.2.0
+
 [keepachangelog-site]: https://keepachangelog.com/en/1.0.0/
 [semver-site]: https://semver.org/spec/v2.0.0.html