build: update changelog

CHANGELOG.md

@@ -1,10 +1,34 @@
 # Changelog
 
-## Release 0.1.2
-- Fix crate versions in README.md and rust docs
+All notable changes to this project will be documented in this file.
 
-## Release 0.1.1
-- Update README.md
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/).
 
-## Release 0.1.0
-- First release
+## [Unreleased]
+
+## [0.2.0] - 2023-04-02
+
+### Added
+
+- Implement knossos CLI
+- Add new narrow and broad ASCII formatters
+
+### Fixed
+
+- Fix method to validate if a maze is valid
+
+### Changed
+
+- Use bitflags to optimize and speed up maze generation process
+
+## [0.1.2] - 2022-04-11
+
+### Added
+
+- Orthogonal maze builder with 10 optional generation algorithms
+- Ascii, game map and image formatters to save the generated maze to files
+
+[unreleased]: https://github.com/unrenamed/knossos/compare/v1.2.0...HEAD
+[0.2.0]: https://github.com/unrenamed/knossos/compare/v0.1.2...v0.2.0
+[0.1.2]: https://github.com/unrenamed/knossos/releases/tag/v0.1.2