Add Changelog

Changelog.md

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+# 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).
+
+## [Unreleased]
+
+### Added
+
+- Added a changelog.
+  #17 by @mattt.
+
+### Fixed
+
+- Fixed abbreviation for "Universal Declaration of Human Rights" (UDHR)
+  throughout project.
+  #12 by @regexident.
+
+## [0.3.2] - 2020-04-24
+
+### Fixed
+
+- Fixed implementations of `insert` methods.
+  #10 by @Lukas-Stuehrk 
+
+## [0.3.1] - 2020-04-23
+
+### Fixed
+
+- Fixed error caused by missing a case for `CMARK_NODE_DOCUMENT` in `Node.create`.
+  #8 by @mattt.
+
+### Removed
+
+- Removed `assertionFailure` in `Node` `cmark_node_type` class property.
+  1903d99 by @mattt.
+
+## [0.3.0] - 2020-04-10
+
+### Added
+
+- Added implementations of `buildIf` and `buildEither` to `StringBuilder`.
+  #5 by @mattt.
+
+### Changed
+
+- **Breaking Change**.
+  Changed `HTML`, renaming it to `RawHTML`.
+  #4 by @mattt.
+- Changed `Node` to conform to `Codable`.
+  #6 by @mattt.
+- Changed access level of `Node` from `open` to `public`.
+  #6 by @mattt.
+- Change access level for APIs referencing `cmark_node` to `internal`
+  #6 by @mattt.
+- Changed swift-cmark dependency to more recent version.
+  2239c9c by @mattt.
+
+### Fixed
+
+- Fixed error 'Top-level Document encoded as string JSON fragment.'
+  727e38f by @mattt.
+
+## [0.2.2] - 2020-02-06
+
+### Fixed
+
+- Fixed bug in how closed ranges are constructed from reported source positions.
+  #2 by @mattt.
+
+## [0.2.1] - 2020-01-25
+
+### Added
+
+- Added `ForEach` type to `CommonMarkBuilder` module.
+  3cee5da by @mattt.
+- Added implementations of `buildIf` and `buildEither` to `CommonMarkBuilder`.
+  a125d23 by @mattt.
+- Added convenience initializers to `List` for mapping sequence of values.
+  ec61c45 by @mattt.
+
+### Changed
+
+- Changed `List.Item` to allow initialization with `Inline` or `Block` children.
+  c21468c0 by @mattt.
+- Changed inline types conform to `ListItemConvertible`.
+  ffe900bf by @mattt.
+- Changed access of children to `public` and conformed them to `Block & Node`.
+  5e88c519 by @mattt
+
+### Removed
+
+- Removed conformance of `Document` to `CustomReflectable`.
+  6b92588e by @mattt.
+- Removed `Child` typealias in favor of explicit compound types.
+  c9a5b199 by @mattt.
+
+## [0.2.0] - 2020-01-24
+
+### Added
+
+- Added CommonMarkBuilder interface.
+  79a98dd by @mattt.
+
+### Changed
+
+- Changed access level for `Node` to open.
+  79a98dd by @mattt.
+- Changed initialization pattern of `Node`.
+  79a98dd by @mattt.
+- Changed `ListItem`, renaming it to `List.Item`.
+  79a98dd by @mattt.
+- Changed initializers for `Node` subclasses
+  79a98dd by @mattt.
+
+### Removed
+
+- Removed `BulletList` and `OrderedList`,
+  consolidating them into into a new `List` type.
+  79a98dd by @mattt.
+
+## [0.1.2] - 2020-01-22
+
+### Changed
+
+- Changed cmark dependency to pin to a tag in a fork.
+  2f5a2a4 by @mattt.
+
+## [0.1.1] - 2020-01-22
+
+### Changed
+
+- Changed cmark dependency to pin to a specific revision.
+  90704ff by @mattt.
+
+## [0.1.0] - 2020-01-22
+
+### Added
+
+- Added node creation and mutation functionality.
+  a41ba246 by @mattt.
+
+## [0.0.1] - 2020-01-27
+
+Initial release.
+
+[unreleased]: https://github.com/SwiftDocOrg/CommonMark/compare/0.3.2...master
+[0.3.2]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.3.2
+[0.3.1]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.3.1
+[0.3.0]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.3.0
+[0.2.2]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.2.2
+[0.2.1]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.2.1
+[0.2.0]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.2.0
+[0.1.2]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.1.2
+[0.1.1]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.1.1
+[0.1.0]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.1.0
+[0.0.1]: https://github.com/SwiftDocOrg/CommonMark/releases/tag/0.0.1