Adds CHANGELOG entry for #171

Author: michalbundyra

CHANGELOG.md

@@ -22,6 +22,10 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
+- [#171](https://github.com/zendframework/zend-code/pull/171) changes
+  curly braces in array and string offset access to square brackets
+  in order to prevent issues under the upcoming PHP 7.4 release.
+
 - [#164](https://github.com/zendframework/zend-code/pull/164) fixes indentation in multi-level arrays generated by `ValueGenerator`.
 
 ## 3.3.1 - 2018-08-13