Add changelog entry

Author: stlehmann

CHANGELOG.md

@@ -4,13 +4,16 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [Unreleased]
+## 5.14.2.1
 
 ### Added
 * [#39](https://github.com/stlehmann/PyQt5-stubs/pull/39) Add this changelog file
+* [#36](https://github.com/stlehmann/PyQt5-stubs/pull/36), [#41](https://github.com/stlehmann/PyQt5-stubs/pull/41
+) New build script for upstream stubs includes extra
+ packages
+like QtWebEngine and Qt3D
 
 ### Changed
-
 * [#38](https://github.com/stlehmann/PyQt5-stubs/pull/38) Changed license to GPLv3 to be compilient with PyQt5 license
 
 ### Fixed