added project changelog

CHANGELOG.md

@@ -0,0 +1,29 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [Unreleased]
+
+## [2.0.1]
+### Added
+- Added capability to set multiple dps values ofer MQTT-Command
+
+### Changed
+- MQTT-Topic no longer requires a device type
+
+### Removed
+
+## [2.0.0]
+### Added
+
+### Changed
+
+### Removed
+
+## [1.0.0]
+### Added
+
+### Changed
+
+### Removed