Update changelog

Author: jodal

docs/changelog.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## NEXT
+- Split source code into multiple private modules.
+  See [PR #119](https://github.com/pelme/htpy/pull/119).
+  Thanks to [Stein Magnus Jodal (@jodal)](https://github.com/jodal).
+- Add `@with_children` decorator to help creating custom components that get passed children in the same way as regular HTML elements.
+  See [PR #113](https://github.com/pelme/htpy/pull/113).
+  [Read the docs for more details](common-patterns.md#components-with-children).
+  Thanks to [Stein Magnus Jodal (@jodal)](https://github.com/jodal).
+
 ## 25.5.0 - 2025-05-25
 - Allow multiple attribute dictionaries when defining `Elements`. [PR #117](https://github.com/pelme/htpy/pull/117). Thanks to [Chase Sterling @gazpachoking](https://github.com/gazpachoking).