Update CHANGELOG

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

.markdownlint.yml

@@ -1,3 +1,5 @@
 no-inline-html:
   allowed_elements:
     - kbd
+no-duplicate-header:
+  allow_different_nesting: true

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Way more unit tests ([#4](https://github.com/MillironX/Kelpie.jl/pull/4))
+
 ### Changed
 
 - Arrays of content replaced with argument splatting ([#2](https://github.com/MillironX/Kelpie.jl/pull/2))