[Docs] Update changelog and bump version

Author: lindyhopchris

CHANGELOG.md

@@ -3,7 +3,7 @@
 All notable changes to this project will be documented in this file. This project adheres to
 [Semantic Versioning](http://semver.org/) and [this changelog format](http://keepachangelog.com/).
 
-## Unreleased
+## [1.0.0-beta.3] - 2021-04-26
 
 ### Added