docs: changelog for v0..2.0

changelogs/0.2.0.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/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.2.0] - 2021-10-26
+### Added
+- Import one mygb backup file
+- Delete admin user from projects and groups after importation
+- Report the status of the users of the target GitLab instance from a mygb backup file
+
+### Changed
+- Add archived filter on export
+- Fix: export all project for the user's namespace
+
+## [0.1.0] - 2021-09-06
+### Added
+- Init configuration file
+- Export all my groups and project from one GitLab instance