"Array to string conversion" error when AllowedFilter's value is a multidimensional array

[ghost]

Hello,

I have issues when try to allow filtering by value that is a multidimensional array.

$query = QueryBuilder::for(Post::class)
	->allowedFilters([
		// ...
		AllowedFilter::custom('having_metadata', new PostFilter('having_metadata')),
	]);

where metadata is an array:

[
    [
        'key' => 'some key 1',
        'value' => 'some value 1',
    ],
    [
        'key' => 'some key 2',
        'value' => 'some value 2',
    ],
]

I always get the error "Array to string conversion". Because in the \Spatie\QueryBuilder\AllowedFilter::resolveValueForFiltering the array_diff function is used. And this function is unable to convert my value to a string.

Thank you for helping.