Conditionally exclude multiple properties

[ju5t]

There is a feature we could use, but before creating a PR, I thought I'd bring it up first. Every now and then we need to conditionally exclude multiple properties at once.

We could use something like excludeManyWhen(['a', 'b', 'c',], fn () => true !== false).

Would you consider something like this?

[rubenvanassche]

Why not update the method signature to public function includeWhen(string|array $include, bool|Closure $condition):. That way we don't need to introduce more methods. I would accept this PR btw.