currently it's not possible to modify the order in which objects get deployed from within a deployment package.
We could try and implement this functionality but a possible work-around for now might be to script the objects, from where you can then change the deployment sequence. To do this:
Right-click on a database and select "Script from Source Control". Then select the objects you want to script. You'll note that when selecting a Script object you can move the position of the script up or down to modify it's deploy sequence.
We'll get started on trying to include similar functionality into the deploy package functionality and will update you once we have an updated build.