Error in ci `Error: The PHPUnit Polyfills library is a requirement for running the WP test suite.` for WordPress tests

[Shelob9]

• Should be in https://github.com/imaginarymachines/pm-server
• Error: The PHPUnit Polyfills library is a requirement for running the WP test suite: https://github.com/imaginarymachines/imaginary-webhooks/actions/runs/3452136297/jobs/5761837647#step:9:67
• Tests pass locally, that dependency is installed
• I saw that it wasn't able to add a plugin, I allowed it in config https://github.com/imaginarymachines/imaginary-webhooks/commit/e940def32815d3b16599699dfe645bf2b02a5380 https://getcomposer.org/doc/06-config.md#allow-plugins
• Running docker-compose run --rm phpunit composer install imaginary-webhooks after adding that did not prevent prompt. that makes no sense!

• 

This issue should be in https://github.com/imaginarymachines/pm-server

Theories

• Missing this in setup: https://github.com/Yoast/PHPUnit-Polyfills#q-how-do-i-run-my-tests-when-the-library-is-installed-via-the-github-actions-setup-php-action-
• Should do things the way a core plugin does: https://github.com/WordPress/wordpress-importer/tree/master/.github/workflows

[Shelob9]

Also https://github.com/imaginarymachines/wp-phpunit is missing support for new wp versions, I don't have time for this right now.