add changelog

Author: faroit

CHANGELOG.md

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+# Changelog
+
+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).
+
+## [0.4.3] - 2025-05-28
+
+### Added
+- Support for NumPy 2.0 compatibility
+
+### Fixed
+- Fixed path check functionality (#84) - Thanks to @hykilpikonna
+- Updated package requirements to support NumPy 2.0 (#85)
+
+### Contributors
+- @hykilpikonna - Fixed path check functionality
+
+## [0.4.2] - 2023-11-24
+
+### Fixed
+- Fixed sample rate conversion support - `mus = musdb.DB(download=True, subsets="test", sample_rate=16000)` now correctly resamples audio on-the-fly