Compatibility with PHP 8.1

[letrollpoilu]

Hi there,

In PHP 8.1 I have a Warning message while using this package:

`Deprecated function: Return type of DOMWordsIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include() (line 19 of vendor/antoligy/dom-string-iterators/src/DOMWordsIterator.php).

include('............/web/vendor/antoligy/dom-string-iterators/src/DOMWordsIterator.php') (Line: 122)
Composer\Autoload\ClassLoader::Composer\Autoload\{closure}('......../web/vendor/composer/../antoligy/dom-string-iterators/src/DOMWordsIterator.php') (Line: 443)
Composer\Autoload\ClassLoader->loadClass('DOMWordsIterator') (Line: 611)`