DOC: update CHANGELOG

CHANGELOG.md

@@ -2,14 +2,27 @@
 
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-
 ## [Unreleased] ##
 
 ### Added ###
 
+### Changed ###
+
+### Deprecated ###
+
+### Removed ###
+
+### Fixed ###
+
+### Security ###
+
+## [0.2.5] - 2020-04-24##
+
+### Added ###
+
 * `apiutils.apply_to_ids` -- a helper which applies a function to all ids which
   are used by an entity (own entity, parents, properties, references etc.).
 
@@ -21,7 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * import bugs in apiutils
 
-## [0.2.4]
+## [0.2.4] -- 2020-04-23
 
 ### Added