aps message parameter should have a `mutable-content` key (starting with iOS 10) Right now it can be added by using [a custom parameter](https://github.com/zendframework/ZendService_Apple_Apns/blob/master/library/ZendService/Apple/Apns/Message.php#L390) but it would be better to have it in its own attribute (getter/setter)
aps message parameter should have a
mutable-contentkey (starting with iOS 10)Right now it can be added by using a custom parameter but it would be better to have it in its own attribute (getter/setter)