Issue with tracking multiple push notifications in same publish

[vsai]

We are recommended to pass in an array of messages to expo server, to reduce the number of requests being made.

However, when I make a request where there is an array, the response object only displays one element.

I think this has to do with:

      def extract_data(response)
        response.fetch('data').first
      end

Is there a reason for this? Why not simply return response.fetch('data')

Even better, it may be a good idea to do:

      def extract_data(response)
        data = response.fetch('data')
        (data.class == Hash) ? [data] : data
      end

So we can always expect an array response.

I'm not sure if I'm missing something, which is why I'm posting here.

[vsai]

It looks like it may also apply to the error messages.

It only seems to look at the first response, rather than simply return the array of responses.

[coffenbacher]

We also noticed this; I think it's an issue.

[coffenbacher]

also seems like duplicate of #13