Update dependencies for Drupal 9.3

Problem/Motivation

There's some fixes commited to Symfony and laminas-diactoros

https://github.com/laminas/laminas-diactoros/releases/tag/2.8.0
https://github.com/symfony/symfony/releases/tag/v5.3.9 https://github.com/symfony/symfony/releases/tag/v5.3.8
https://github.com/symfony/symfony/releases/tag/v4.4.32 https://github.com/symfony/symfony/releases/tag/v4.4.31

Proposed resolution

$ COMPOSER_ROOT_VERSION=9.3.x-dev composer update --with=phpunit/phpunit:^8 -W

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet

$ ~/.composer/vendor/bin/composer-lock-diff --no-links
+------------------------------+---------+---------+
| Production Changes           | From    | To      |
+------------------------------+---------+---------+
| laminas/laminas-diactoros    | 2.7.0   | 2.8.0   |
| symfony/debug                | v4.4.27 | v4.4.31 |
| symfony/dependency-injection | v4.4.27 | v4.4.31 |
| symfony/http-kernel          | v4.4.30 | v4.4.32 |
| symfony/mime                 | v5.3.7  | v5.3.8  |
| symfony/serializer           | v4.4.27 | v4.4.31 |
| symfony/translation          | v4.4.30 | v4.4.32 |
| symfony/validator            | v4.4.30 | v4.4.31 |
| symfony/var-dumper           | v5.3.7  | v5.3.8  |
+------------------------------+---------+---------+

+-----------------------------+--------+--------+
| Dev Changes                 | From   | To     |
+-----------------------------+--------+--------+
| phpdocumentor/type-resolver | 1.4.0  | 1.5.0  |
| phpunit/phpunit             | 8.5.20 | 8.5.21 |
| symfony/phpunit-bridge      | v5.3.7 | v5.3.8 |
+-----------------------------+--------+--------+