Releases 2.0.0 version

Author: maciejlew

CHANGELOG.md

@@ -3,7 +3,7 @@ All notable changes to this project will be documented in this file.
 
 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]
+## [2.0.0] - 2018-10-30
 ### Added
 - support for `Ping`
 - basic support for `Push`