Merge branch 'changelog' into 'master'

add changelog

See merge request !9

CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/).
+
+## [Unreleased]
+
+### Added
+- added changelog
+- Use format strings instead of assuming concatenation
+- added mypy to precommit
+
+### Changed
+- from now on, yaqd-gdrive will use calendar based versioning
+- cleanup repository
+
+## [0.2.0]
+
+### Fixed
+- fixed import
+
+## [0.1.1]
+
+### Fixed
+- make find_packages work
+
+## [0.1.0]
+
+### Added
+- initial release
+
+[Unreleased]: https://gitlab.com/yaq/yaqd-gdrive/-/compare/v0.2.0...master
+[0.2.0]: https://gitlab.com/yaq/yaqd-gdrive/-/compare/v0.1.1...v0.2.0
+[0.1.1]: https://gitlab.com/yaq/yaqd-gdrive/-/compare/v0.1.0...v0.1.1
+[0.1.0]: https://gitlab.com/yaq/yaqd-gdrive/-/tags/v0.1.0