Adds CHANGELOG entry for #1

Author: weierophinney

CHANGELOG.md

@@ -8,13 +8,18 @@ All notable changes to this project will be documented in this file, in reverse
 
 - Nothing.
 
+### Changed
+
+- Nothing.
+
 ### Deprecated
 
 - Nothing.
 
 ### Removed
 
-- Nothing.
+- [#1](https://github.com/zendframework/zend-xml2json/pull/1) removes an
+  obsolete `@deprecated` annotation.
 
 ### Fixed