Update CHANGELOG.md

Signed-off-by: Nathanael Esayeas <nathanael.esayeas@protonmail.com>

CHANGELOG.md

@@ -2,8 +2,25 @@
 
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](http://keepachangelog.com/)
-and this project adheres to [Semantic Versioning](http://semver.org/).
+The format is based on [Keep a Changelog](https://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](https://semver.org/).
+
+## 3.0.0 - 2024-02-09
+
+### Removed
+
+- Constant `Ghostwriter\Json\Interface\JsonInterface::DECODE` was removed
+- Constant `Ghostwriter\Json\Interface\JsonInterface::DEPTH` was removed
+- Constant `Ghostwriter\Json\Interface\JsonInterface::EMPTY` was removed
+- Constant `Ghostwriter\Json\Interface\JsonInterface::ENCODE` was removed
+- Constant `Ghostwriter\Json\Interface\JsonInterface::IGNORE` was removed
+- Constant `Ghostwriter\Json\Interface\JsonInterface::PRETTY` was removed
+
+### Changed
+
+- The return type of `Ghostwriter\Json\Interface\JsonInterface#decode()` changed from `mixed` to `array`
+- Parameter 1 of `Ghostwriter\Json\Interface\JsonInterface#encode()` changed name from `int $flags = 0` to `bool $prettyPrint = false`
+- Parameter 1 of `Ghostwriter\Json\Interface\JsonInterface#validate()` changed name from `int $flags = 0` to `bool $ignoreInvalidUtf8 = false`
 
 ## 2.0.0 - 2023-12-09