CHANGELOG entry for initializer types.

Author: chriskrycho

CHANGELOG.md

@@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 ## [Unreleased]
 
 * Fix default blueprint for `types/<my app>/index.d.ts`: add missing import and an export statement so ambient declarations work.
+* Add types to initializer and instance initializer blueprints.
 
 ## [1.1.2] - 2018-02-13