feat: add changelog

CHANGELOG.md

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+# Changelog
+
+## [1.3.0] - 2024-06-28
+
+-   **Feature:** Added support for PHP 8.1 and 8.2.
+-   **Enhancement:** Improved timezone list retrieval performance.
+-   **Bugfix:** Corrected `listByRegion` method to handle edge cases correctly.
+-   **Documentation:** Updated README with new usage examples and installation instructions.
+
+## [1.2.0] - 2023-01-30
+
+-   **Bugfix:** Fixed `listByRegion` method to accurately filter timezones by region.
+-   **Enhancement:** Added more detailed error messages for invalid timezone entries.
+-   **Maintenance:** Updated dependencies to the latest versions for security improvements.
+
+## [1.1.0] - 2023-01-30
+
+-   **Bugfix:** Resolved namespace issues with the facade.
+-   **Enhancement:** Improved handling of default time zones in configurations.
+-   **Documentation:** Added section for troubleshooting common issues.
+
+## [1.0.0] - 2023-01-30
+
+-   **Initial Release:** First release of the php-time-zone package, providing a comprehensive list of all PHP-supported time zones with various utility methods for easy manipulation and retrieval.