Update changelog

CHANGELOG.md

@@ -5,6 +5,15 @@ 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]
+
+### Fixed
+
+- The parser used to get confused by anonymous matrices, so something like `[1 2; -3 -1]^2`
+  wouldn't actually include the squaring. This is now fixed.
+- When animating a sequence with transitional animation, we now reset if the start and target
+  matrices are the same
+
 ## [0.4.0] - 2022-11-17
 
 ### Added