Release 8.0.0

Author: mmoll

CHANGELOG.md

@@ -3,7 +3,7 @@
 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).
 
-## [8.0.0] -
+## [8.0.0] - 2021-08-31
 ### Added
 - Add `MO4.WhiteSpace.ConstantSpacing`
 - Add `MO4.WhiteSpace.MultipleEmptyLinesSniff`