Added changelog

Author: sea5kg

CHANGELOG.md

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+# wsjcpp-yaml Changelog
+
+All notable changes to wsjcpp-yaml project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [v0.1.6] - 2022-01-08 (2022 Jan 8)
+
+### Fixed 
+
+- Fixed #29 Problem with lost empty line
+- Fixed #27 renamed 'intent' to 'indent'