Composer: update to YoastCS 2.2.0

[jrfnl]

Context

• Update dev tools

Summary

This PR can be summarized in the following changelog entry:

• Update dev tools

Relevant technical choices:

Composer: update to YoastCS 2.2.0

... which includes PHP Parallel Lint by design, so no need to require it separately anymore.

Refs:

• https://github.com/Yoast/yoastcs/releases
• https://github.com/php-parallel-lint/PHP-Parallel-Lint/releases
• https://github.com/PHPCompatibility/PHPCompatibilityWP/releases

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• N/A if the build passes we're good.