* Add nullable types
* Removing deprecated E_STRICT constant from test suite.
* Added PHP 8.4 RC1 as test image
* PHP version bump in the README.md.
* Added PHP 8.4 to CI
* Add running tests for PHP 8.4
* Using unsupported PHP functions and unregistered static class methods in modifiers and expressions now triggers a deprecation notice because we will drop support for this in the next major release