docs: prepare v0.3.0 release

CHANGELOG.md

@@ -4,6 +4,27 @@ 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).
 
+## [0.3.0] - 2021-02-20
+
+### Added
+
+- Feature: Added support for parsing ink drawings.
+
+### Changed
+
+- **BREAKING**: Renamed `Outline::items_level` to `Outline::child_level` for
+  consistency
+- Internal: Reorganized the OneNote parser code for more consistency
+
+### Fixed
+
+- Fixed incorrect parsing of internal object references in some
+  cases (see [c3e8a11], [8ac69a1] and [bb4abef])
+
+[c3e8a11]: https://github.com/msiemens/onenote.rs/commit/c3e8a112901f2789241ecf6b7a878463d98ed415
+[bb4abef]: https://github.com/msiemens/onenote.rs/commit/bb4abef1205a0a438ab4236719ea8bd7ed1d308a
+[8ac69a1]: https://github.com/msiemens/onenote.rs/commit/8ac69a1fa44be9f774d9293ec1e3f3908cb447ec
+
 ## [0.2.1] - 2020-10-27
 
 ### Changed