2.0.0

Breaking Changes

• Minimum PHP version raised from 7.2.5 to 8.1. PHP 7.x and 8.0 are no longer supported.

Changes

• Add support for psr/http-message v2.0 (constraint is now ^1.1 || ^2.0). Resolves dependency conflicts with libraries requiring PSR-7 v2. (#275)
• Fix PHP 8.4 implicit-nullable deprecation warnings. (#280)
• Upgrade guzzlehttp/guzzle constraint to ^7.4.
• Upgrade test/lint tooling (PHPUnit 9+, php-cs-fixer 3, GitHub Actions v4).
• Remove committed composer.lock.
• Update CI to test PHP 8.1-8.4.
• Update README to reflect current requirements and project status.

See CHANGELOG.md for full details.