add changelog

CHANGELOG.md

@@ -0,0 +1,33 @@
+# 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]
+
+- Simplify code
+  in [#1](https://github.com/nim65s/matrix-webhook/pull/1)
+  by [@homeworkprod](https://github.com/homeworkprod)
+- Update aiohttp use and docs
+  in [#5](https://github.com/nim65s/matrix-webhook/pull/5)
+  by [@svenseeberg](https://github.com/svenseeberg)
+- Setup Tests, Coverage & CI ; update tooling
+  in [#7](https://github.com/nim65s/matrix-webhook/pull/7)
+  by [@nim65s](https://github.com/nim65s)
+- Setup argparse & logging
+  in [#8](https://github.com/nim65s/matrix-webhook/pull/8)
+  by [@nim65s](https://github.com/nim65s)
+- Setup packaging
+  in [#9](https://github.com/nim65s/matrix-webhook/pull/9)
+  by [@nim65s](https://github.com/nim65s)
+
+## [1.0.0] - 2020-03-14
+- Update to matrix-nio & aiohttp & markdown
+
+## [1.0.0] - 2020-02-14
+- First release with matrix-client & http.server
+
+[Unreleased]: https://github.com/nim65s/matrix-webhook/compare/v2.0.0...devel
+[2.0.0]: https://github.com/nim65s/matrix-webhook/compare/v1.0.0...v2.0.0
+[1.0.0]: https://github.com/nim65s/matrix-webhook/releases/tag/v1.0.0