Add 6.0.0 to CHANGELOG

[ci skip]

Author: mmoll

CHANGELOG.md

@@ -3,6 +3,16 @@
 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).
 
+## [6.0.0] - 2020-10-29
+### Added
+- Add `SlevomatCodingStandard.Classes.DisallowMultiConstantDefinition`
+- Add `SlevomatCodingStandard.Commenting.UselessInheritDocComment`
+- Add `SlevomatCodingStandard.Functions.StaticClosure`
+- Add `SlevomatCodingStandard.Namespaces.UseSpacing`
+- Add `PSR12` (excluding conflicting rules)
+### Changed
+- Raised PHP requirement to 7.2
+
 ## [5.0.0] - 2019-12-16
 ### Added
 - Add `Squiz.WhiteSpace.FunctionSpacing`

README.md

@@ -140,7 +140,7 @@ If `phpcs` complains that MO4 is not installed, please check the installed codin
 * [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) version 3.5 or later
 * [David Joos's Symfony Coding Standard](https://github.com/djoos/Symfony-coding-standard) version 3.10 or later
 * [Composer installer for PHP_CodeSniffer coding standards](https://github.com/DealerDirect/phpcodesniffer-composer-installer)
-* [Slevomat Coding Standard](https://github.com/slevomat/coding-standard) version 6.0 or later
+* [Slevomat Coding Standard](https://github.com/slevomat/coding-standard) version 6.2 or later
 
 ## Contributing