release v0.4.0

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.4.0] - 2020-06-14
 ### Added
 - Added command line parameter `--mqtt-password-file`
 
@@ -29,7 +31,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Subscribe to `homeassistant/switch/switchbot/+/set`.
   Handle `ON` and `OFF` messages.
 
-[Unreleased]: https://github.com/fphammerle/switchbot-mqtt/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/fphammerle/switchbot-mqtt/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/fphammerle/switchbot-mqtt/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/fphammerle/switchbot-mqtt/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/fphammerle/switchbot-mqtt/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/fphammerle/switchbot-mqtt/releases/tag/v0.1.0