PHP 7.4
Changes that should happen once we drop PHP 7.4.
Remove symfony/polyfill-php80 dependency
We use PHP 8.0 functions within our code base (to not add legacy code and deprecations).
One example is Classes/ where we use str_ends_with().
We therefore added symfony/polyfill-php80 as composer package to already make use of those functions.
We can drop that package once we are at least on PHP 8.0.