Funding Request: Upgrade to PHPUnit 11 in Flow & Neos

[kdambekalns (Karsten Dambekalns)]

@bwaidelich

Just wondering: (why) is PHPUnit 12 out of reach?

Because:

@kdambekalns

Q: Why PHPUnit 11 and Flow/Neos 8.4?
A: Because that is the only combination where the minimum PHP version matches.

PHPUnit 12 requires a newer PHP version than we do.