Add changelog for 1.0.0 and 1.0.1.

Author: icedream

CHANGELOG.md

@@ -0,0 +1,17 @@
+# 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).
+
+## [1.0.1] - 2022-07-11
+### Changed
+- Code is now properly licensed under 2-clause BSD license. #7
+- Updated github.com/dsnet/compress to 0.0.1.
+
+## [1.0.0] - 2018-11-30
+### Added
+- Add bsdiff diffing and patching functionality.
+
+[1.0.1]: https://github.com/icedream/go-bsdiff/releases/tag/v1.0.1
+[1.0.0]: https://github.com/icedream/go-bsdiff/releases/tag/v1.0.0