Update CHANGELOG for 0.1.0 release

CHANGELOG.md

@@ -1,10 +1,18 @@
 # 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]
 
+## [0.1.0] (Feb 24 2023)
+
 - Create parameter data classes (`Param` and `Struct`)
 - Create database class `ParamDB` to store parameters in a SQLite file
 - Add ability to retrieve the commit history as `CommitEntry` objects
 - Create [documentation website](https://painterqubits.github.io/paramdb)
 
-[unreleased]: https://github.com/PainterQubits/paramdb
+[unreleased]: https://github.com/PainterQubits/paramdb/compare/v0.1.0...main
+[0.1.0]: https://github.com/PainterQubits/paramdb/releases/tag/v0.1.0