Prepare v0.3.0 release

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.0]
+
 ### Added
 
 - Output URL in message when a build is found
@@ -83,7 +85,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Trigger a system notification on build completion with `--notification`
 - Output the content of the notification as a JSON object with `--output-notification-json`
 
-[unreleased]: https://github.com/liamdawson/buildkite_waiter/compare/v0.2.1...HEAD
+[unreleased]: https://github.com/liamdawson/buildkite_waiter/compare/v0.3.0...HEAD
+[0.3.0]: https://github.com/liamdawson/buildkite_waiter/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/liamdawson/buildkite_waiter/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/liamdawson/buildkite_waiter/compare/v0.1.1...v0.2.0
 [0.1.1]: https://github.com/liamdawson/buildkite_waiter/compare/v0.1.0...v0.1.1