Update dependencies for 9.3.x

Problem/Motivation

Let's update dependencies one more time before the alpha so everything is on the latest version.

- https://github.com/symfony/symfony/releases/tag/v4.4.33
- https://github.com/symfony/symfony/releases/tag/v5.3.10

Steps to reproduce

Proposed resolution

Run 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

+------------------------------+---------+---------+
| Production Changes           | From    | To      |
+------------------------------+---------+---------+
| composer/semver              | 3.2.5   | 3.2.6   |
| symfony/console              | v4.4.30 | v4.4.33 |
| symfony/dependency-injection | v4.4.31 | v4.4.33 |
| symfony/http-foundation      | v4.4.30 | v4.4.33 |
| symfony/http-kernel          | v4.4.32 | v4.4.33 |
| symfony/serializer           | v4.4.31 | v4.4.33 |
| symfony/validator            | v4.4.31 | v4.4.33 |
| symfony/var-dumper           | v5.3.8  | v5.3.10 |
+------------------------------+---------+---------+

+------------------------+---------+---------+
| Dev Changes            | From    | To      |
+------------------------+---------+---------+
| composer/ca-bundle     | 1.2.11  | 1.3.1   |
| composer/composer      | 2.1.9   | 2.1.10  |
| symfony/lock           | v4.4.27 | v4.4.33 |
| symfony/phpunit-bridge | v5.3.8  | v5.3.10 |
+------------------------+---------+---------+