Update changelog

CHANGELOG.md

 
+<a name="v0.3.0"></a>
+## [v0.3.0] - 2022-12-23
+### Add Features
+- Cache is obsolete
+- CloneNode is now public
+
+### Changes
+- add test case
+
+
 <a name="v0.2.1"></a>
 ## [v0.2.1] - 2022-12-20
 ### Bug Fixes
@@ -17,4 +27,5 @@
 - work in progress
 
 
+[v0.3.0]: https://gitlab.schukai.com/oss/libraries/go/markup/html/compare/v0.2.1...v0.3.0
 [v0.2.1]: https://gitlab.schukai.com/oss/libraries/go/markup/html/compare/v0.2.0...v0.2.1