Create CHANGELOG.md

Author: hirrolot

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).
+
+## unreleased
+
+## 0.1.0 - 2022-03-30
+
+### Added
+
+ - This awesome library.