Update CHANGELOG

Author: paulbalandan

CHANGELOG.md

@@ -5,6 +5,19 @@ All notable changes to this library 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).
 
+## [v2.1.0](https://github.com/NexusPHP/cs-config/compare/v2.0.2..v2.0.2) - 2020-12-08
+
+### Added
+
+- Added support for new fixers in [v2.17.0 Desert Beast](https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/tag/v2.17.0).
+- Added `Nexus74` ruleset for support on `use_arrow_functions` fixer.
+- Added testing for deprecated fixers.
+
+### Changed
+
+- `phpdoc_line_span` has been set to single for all classy elements.
+- `binary_operator_spaces` has been set to its default `single_space` for use in this library.
+
 ## [v2.0.2](https://github.com/NexusPHP/cs-config/compare/v2.0.1..v2.0.2) - 2020-12-01
 
 ### Fixed