Edit the changelog.

CHANGELOG.md

@@ -5,6 +5,23 @@ All notable changes to this project 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).
 
+## [1.2.0](https://github.com/janaSunrise/HypixelIO/releases/tag/v1.2.0) - 09-03-2021
+
+## Added
+- Skyblock models
+- Skyblock endpoints
+- Added HTML documentation
+- More utility functions and support to make it easier and reliable.
+- Asynchronous support for discord bot devs and other people to keep it non-blocking.
+
+## Fixed
+- Rewrote most of the code base.
+- Rewrite of the inline documentation.
+- Pass API Key as `API-Key` header so it's secure and follows the standards.
+- Refactored the methods to get better support and converted into multiple methods so its cleaner.
+- Fixed the tests and the errors / exceptions raised when issues arrive.
+- Make the rest of the codebase usable by the endpoint user, if needed. Not compulsary.
+
 ## [1.1.1](https://github.com/janaSunrise/HypixelIO/releases/tag/v1.1.1) - 29-12-2020
 
 ## Added