Update CHANGELOG.md (next version is 1.0.0-beta.2)

CHANGELOG.md

@@ -4,6 +4,25 @@ 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).
 
+## [1.0.0-beta.2] - Unreleased
+### Added
+-
+
+### Changed
+-
+
+### Deprecated
+-
+
+### Removed
+-
+
+### Fixed
+-
+
+### Security
+-
+
 ## [1.0.0-beta.1] - 2020-04-15
 ### Added
 - Special behaviour for attribute value ``__undefined__`` (invisibility, no shortcuts to be set in AAM)