Update CHANGELOG.md

CHANGELOG.md

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-# Releases
+# Changelog
 
-### Initial release (11th September, 2023; v0.1.0)
-Contains simple function and string parsing.
+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]
+
+## [0.5.0] - 2023-10-13
+
+### Changed
+
+- The change log has been remodeled.
+
+## [0.4.0] - 2023-10-13
+
+### Added
+
+- Documentation
+- Variables now drop at scope end
+- Forever loop
+- Scope runner
+- None type
+
+### Removed
+
+- Examples removed from `src` folder and embedded in `README.md`.
+
+## [0.3.0] - 2023-10-8
+
+### Added
+
+- Float and integer support
+
+### Changed
+
+- Error reporting uses Result instead to (Option, Option).
+
+## [0.2.0] - 2023-10-5
+
+### Added
+
+- Rust workflow to test and build Dawn (dwn).
+- README and CHANGELOG files.
+- IDLE (Integrated Learning and Development Environment)s
+- Variable creations
+- Framework creation for extensions.
+- Examples folder.
+- Tests.
+
+### Changed
+
+- Remade lexer from scratch.
+- Changed interpreter API.
+
+## [0.1.0] - 2023-09-12
+
+### Added
+
+- Simple function and string parsing
+
+[unreleased]: https://github.com/ArnabRollin/dwn/compare/v0.5.0...HEAD
+
+[0.5.0]: https://github.com/ArnabRollin/dwn/compare/v0.4.0...v0.5.0
+
+[0.4.0]: https://github.com/ArnabRollin/dwn/compare/v0.3.0...v0.4.0
+
+[0.3.0]: https://github.com/ArnabRollin/dwn/compare/v0.2.0...v0.3.0
+
+[0.2.0]: https://github.com/ArnabRollin/dwn/compare/v0.1.0..v0.2.0
+
+[0.1.0]: https://github.com/ArnabRollin/dwn/releases/tag/v0.1.0