Symfony/composer показывает устаревшие ошибки в php8.2

Я пытаюсь получить последнюю версию mPDF для моей недавно обновленной (centos) среды dev php (теперь на php 8.2.10), но получаю следующую ошибку Symfony:

$ composer require mpdf/mpdf

Deprecated: Return type of Symfony\Component\Console\Helper\HelperSet::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Symfony3/Component/Console/Helper/HelperSet.php on line 104
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /usr/share/php/JsonSchema5/Constraints/Constraint.php:48
Deprecation Notice: Return type of Symfony\Component\Process\Process::getIterator($flags = 0) should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Symfony3/Component/Process/Process.php:567
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Using ${var} in strings is deprecated, use {$var} instead in /usr/share/php/Composer/Autoload/AutoloadGenerator.php:799
Deprecation Notice: Using ${var} in strings is deprecated, use {$var} instead in /usr/share/php/Composer/Autoload/AutoloadGenerator.php:804
Do not run Composer as root/super user! See https://getcomposer.org/root for details

Куда мне с этим идти?

(PS. Я здесь не эксперт по системному администрированию... Я хорошо разрабатываю, но плохо администрирую. Буду благодарен за любую помощь)

Редактировать № 1 — добавлена ​​информация о версии:

$ composer --version

Deprecated: Return type of Symfony\Component\Console\Helper\HelperSet::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Symfony3/Component/Console/Helper/HelperSet.php on line 104
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /usr/share/php/JsonSchema5/Constraints/Constraint.php:48
Deprecation Notice: Return type of Symfony\Component\Process\Process::getIterator($flags = 0) should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Symfony3/Component/Process/Process.php:567
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Composer/Repository/ArrayRepository.php:286
Deprecation Notice: Using ${var} in strings is deprecated, use {$var} instead in /usr/share/php/Composer/Autoload/AutoloadGenerator.php:799
Deprecation Notice: Using ${var} in strings is deprecated, use {$var} instead in /usr/share/php/Composer/Autoload/AutoloadGenerator.php:804
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Continue as root/super user [yes]?
Composer 2.1.3 2021-06-09 16:31:20