Changelog entry for required global search option in grammar rules

Author: yuryleb

CHANGELOG.md

@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file. For change
 
 ## master
 
+- Global search option is now required for all grammar rules. [#228] (https://github.com/Project-OSRM/osrm-text-instructions/pull/228)
+
 ## 0.14.0 2019-12-04
 
 - Update Japanese localization, add named intersections. [#290](https://github.com/Project-OSRM/osrm-text-instructions/pull/290)