我试图为我最近升级的（centos）dev php环境（现在在php 8.2.10上）获取最新版本的mPDF，但我收到以下Symfony错误：

$ 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

我该怎么办？
(PS.我不是这里的系统管理员Maven……我开发得很好，但我管理得不好。任何帮助将不胜感激）

编辑#1 -新增版本信息：

$ 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