changelog: sync

Author: jcarpent

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Added
 - Added a deprecation call policy shortcut ([#466](https://github.com/stack-of-tasks/eigenpy/pull/466))
+- Added id() helper to retrieve unique object identifier in Python ([#477](https://github.com/stack-of-tasks/eigenpy/pull/477))
 
 ### Fixed
 - Fix register_symbolic_link_to_registered_type() for multiple successive registrations ([#471](https://github.com/stack-of-tasks/eigenpy/pull/471))