Add changelog (#121)

Author: JoelLefkowitz

CHANGELOG.md

@@ -1 +1,24 @@
 # Changelog
+
+## Unreleased
+
+### Added
+
+- Add class docs
+- Add `frozen_string_literal` comments
+
+### Removed
+
+- Remove OpenStruct instances
+- Remove Double quotes
+- Remove Double assertions
+- Remove `allow_any` uses
+
+### Fixed
+
+- Fix spelling mistakes
+- Fix CI gem caching
+- Convert `config.verbose` to a boolean
+- Bump `rexml` to 3.3.9
+
+## v1.3.4 - 2024-04-04