Add CHANGELOG for v0.4.0.

Author: Potherca

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## [v0.4.0](https://github.com/pdsinterop/php-solid-crud/tree/v0.4.0) (2022-01-11)
+
+[Full Changelog](https://github.com/pdsinterop/php-solid-crud/compare/v0.3.2...v0.4.0)
+
+### Pull request(s) without label
+
+- Add support for Auxiliary Resources [\#12](https://github.com/pdsinterop/php-solid-crud/pull/12) (@Potherca)
+
 ## [v0.3.2](https://github.com/pdsinterop/php-solid-crud/tree/v0.3.2) (2022-01-11)
 
 [Full Changelog](https://github.com/pdsinterop/php-solid-crud/compare/v0.3.1...v0.3.2)