Added
Added the startAfter and endBefore filters for the Realtime Database. At the moment they don't seem to have an effect on the returned results (just as if they didn't exist); it's unclear if the implementation is incorrect or if the REST API doesn't support the new
filters yet. If you see why it's not working or if it does work for you, please let me know.
Changed
CloudMessage::withData() allowed the message data to be empty, resulting in the Firebase API rejecting the message. If the message data is empty, the field is now removed before sending the message. (#591)