CHANGELOG.md in hypernova-1.4.0 vs CHANGELOG.md in hypernova-2.0.0

@@ -3,9 +3,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [2.0.0] - 2023-10-06
+
+Official deprecation.
+
 ## [1.4.0] - 2019-01-24
 
 ### Fixed
 
 - `render_batch` receives jobs in hash form [#21](https://github.com/airbnb/hypernova-ruby/pull/21)