Added changes to changelog

Author: Sympatron

CHANGELOG.md

@@ -6,7 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-...
+
+### Changed
+- Changed the names of `UdpClient`/`TcpClient` to `UdpClientStack`/`TcpClientStack`
+- Changed the names of `UdpServer`/`TcpServer` to `UdpFullStack`/`TcpFullStack`
 
 ## [0.2.0] - 2020-12-02