Update dev dependencies and postcss to 8.4.4

Author: yunusga

CHANGELOG.md

@@ -5,6 +5,11 @@ 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/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.2.1] 2021-11-28
+
+- Update **postcss** to [8.4.4](https://github.com/postcss/postcss/releases/tag/8.4.4)
+- Update dev dependencies
+
 ## [4.1.0] 2021-09-13
 
 - Add module for browser