phpcq support for php 8

[sashikamw]

We are getting the following errors when we use autoload validation with php:8.1

Fatal error: During inheritance of IteratorAggregate: Uncaught ErrorException: Return type of PhpCodeQuality\AutoloadValidation\AutoloadValidator\ClassMap::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/ClassMap.php:132
Stack trace:
#0 /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/ClassMap.php(28): {closure}(8192, 'Return type of ...', '/drone/src/src/...', 132)
#1 /drone/src/src/vendor/composer/ClassLoader.php(576): include('/drone/src/src/...')
#2 /drone/src/src/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/drone/src/src/...')
#3 /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/AbstractValidator.php(102): Composer\Autoload\ClassLoader->loadClass('PhpCodeQuality\\...')
#4 /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/AutoloadValidatorFactory.php(137): PhpCodeQuality\AutoloadValidation\AutoloadValidator\AbstractValidator->__construct('autoload.psr-4', Array, '/drone/src/src', Object(PhpCodeQuality\AutoloadValidation\ClassMapGenerator), Object(PhpCodeQuality\AutoloadValidation\Report\Report))
#5 /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/AutoloadValidatorFactory.php(182): PhpCodeQuality\AutoloadValidation\AutoloadValidator\AutoloadValidatorFactory->createValidator('autoload', 'psr-4', Array)
#6 /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/AutoloadValidatorFactory.php(85): PhpCodeQuality\AutoloadValidation\AutoloadValidator\AutoloadValidatorFactory->createValidatorsFromSection('autoload', Array)
#7 /drone/src/src/vendor/phpcq/autoload-validation/src/Command/CheckAutoloading.php(147): PhpCodeQuality\AutoloadValidation\AutoloadValidator\AutoloadValidatorFactory->createFromComposerJson(Array)
#8 /drone/src/src/vendor/symfony/console/Command/Command.php(255): PhpCodeQuality\AutoloadValidation\Command\CheckAutoloading->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#9 /drone/src/src/vendor/symfony/console/Application.php(1021): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#10 /drone/src/src/vendor/symfony/console/Application.php(275): Symfony\Component\Console\Application->doRunCommand(Object(PhpCodeQuality\AutoloadValidation\Command\CheckAutoloading), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 /drone/src/src/vendor/symfony/console/Application.php(149): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#12 /drone/src/src/vendor/phpcq/autoload-validation/bin/check-autoloading.php(92): Symfony\Component\Console\Application->run()
#13 /drone/src/src/vendor/bin/check-autoloading.php(119): include('/drone/src/src/...')
#14 {main} in /drone/src/src/vendor/phpcq/autoload-validation/src/AutoloadValidator/ClassMap.php on line 28