[Docs] Update changelog and bump version

Author: lindyhopchris

CHANGELOG.md

@@ -3,13 +3,13 @@
 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
+## [2.1.0] - 2023-01-24
 
 ### Added
 
 - The cursor pagination implementation now supports id fields that are encoded. To use, pass your schema's id
   field to the cursor pagination class when returning it from the schema's `pagination()` method. For example:
-  
+
 ```php
 public function pagination(): CursorPagination
 {