docs: update CHANGELOG.md for v0.5.0 [skip ci]

Author: JakeStanger

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).
+
+## [v0.5.0] - 2022-11-27
+### :sparkles: New Features
+- [`9fbf1b0`](https://github.com/JakeStanger/corn/commit/9fbf1b0c9ca53c14f787a997bbb067d918142b24) - serde deserialization support *(commit by [@JakeStanger](https://github.com/JakeStanger))*
+
+### :white_check_mark: Tests
+- [`d035fa2`](https://github.com/JakeStanger/corn/commit/d035fa2fd92a5e62081b7d51a56d63222bb6e73e) - update test assets *(commit by [@JakeStanger](https://github.com/JakeStanger))*
+
+
+[v0.5.0]: https://github.com/JakeStanger/corn/compare/v0.4.0...v0.5.0