v0.9.0

New Features

• Implement an event system and move logs to those observers by @KentarouTakeda in #18
• Error response validation and the config setting by @KentarouTakeda in #19

Breaking Changes

• do not dispatch ResponseValidationFailed event with internal error by @KentarouTakeda in #20

What's Changed

• docs: fix format by @KentarouTakeda in #17
• refactor: remove unnecessary code by @KentarouTakeda in #21
• Improve project settings by @KentarouTakeda in #22

Full Changelog: v0.8.1...v0.9.0