ideas for next version: error handling and return types

[tacman]

 public function getPhotos(
        $photosetId,
        $userId = null,
        $extras = null,
        $perPage = null,
        $page = null,
        $privacyFilter = null,
        $media = null
    ) 

With PHP 8, we'll want to add a return type to the methods. Currently in getPhotos(), this is array|bool, but we could make it ?array, and return null instead of false.

It appears that returning false indicates some sort of error, though, so perhaps that's not the best approach.