Add a changelog

Signed-off-by: Thomas A. Christensen II <25492070+MillironX@users.noreply.github.com>

CHANGELOG.md

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+# Changelog
+
+All notable changes to Kelpie.jl 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] - 2022-04-04
+
+### Added
+
+- New Julia package based on [PkgTemplates.jl](https://github.com/invenia/PkgTemplates.jl)
+- Functions to create HTML nodes by name
+- Automatically-generated functions to generate types of HTML nodes
+
+[unreleased]: https://github.com/MillironX/Kelpie.jl/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/MillironX/Kelpie.jl/releases/tag/v0.1.0