Add CHANGELOG

Author: marcqualie

Diff for: CHANGELOG.md

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+# 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/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+
+
+## [0.2.0] - 2020-06-28
+
+### Added
+
+- Store client, cipher and checksum in file metadata
+
+### Fixed
+
+- Only attenpt to decrypt original content if it exists
+
+
+
+## [0.1.1] - 2020-06-28
+
+### Fixed
+
+- Converting rails native credentials files would fail on first run
+
+
+
+## [0.1.0] - 2020-06-28
+
+### Added
+
+- First release!
+- Rails support via monkey patch