Update changelog

CHANGELOG.md

@@ -5,6 +5,18 @@ 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).
 
+## [2.0.0] - 2023-08-17
+
+### Changed
+
+- Updated the `@zxing/library` dependency to `0.20.0`.
+- Renamed `onResult` and `onError` to `onDecodeResult` and `onDecodeError` respectively.
+- Switched the `onDecodeError` error type to use the `Exception` class from `@zxing/library`.
+
+### Added
+
+- Introduced `onError` to handle errors that occur during initialization.
+
 ## [1.1.4] - 2023-03-20
 
 ### Fixed