Problem Statement

Symfony 8 is currently in development. It would be nice if this repository could add the relevant version to its constraints.

Solution Brainstorm

Changing composer.json line from "symfony/phpunit-bridge": "^5.2|^6.0|^7.0", to "symfony/phpunit-bridge": "^5.2|^6.0|^7.0|^8.0", is enough.
I can propose a PR.