decimal: 1.5.3

2026-04-11T00:00:00+00:00

- Fixed isPositive/isNegative to return false for zero values (per GDA spec).
- Added get_properties_for handler for array cast, var_export, and debug output.
- Fixed get_properties_for signature for PHP 7.4 compatibility.
- Added composer.json for PIE/Packagist support.
- Set minimum PHP version to 7.4.