Update CHANGELOG for v3.0.0 release detailing new features and changes

Author: tito10047

CHANGELOG.md

@@ -5,6 +5,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.0.0] - 2026-05-11
+### Added
+- Transition to `altcha` library v3.0 (JavaScript).
+- Support for `altcha-org/altcha` PHP library v2.0.
+- New configuration options: `hmacAlgorithm`, `hmacKeySignature`, `cost`, `counter_min`, `counter_max`, and `timeout`.
+- New services: `DriverKeyProvider` and `SolveChallengeResolver`.
+- New options for `AltchaType` form type (`cost`, `counter_min`, `counter_max`, `timeout`).
+
+See the [upgrade guide](MIGRATE.md) for more details.
 
 ## [2.1.0] - 2025-12-08
 - Remove support for php 8.1