As I said above, yesterday, I created a task to migrate Drupal to a newest PHP version. This task is included in our TODO list, but I can not give you a specific date.
Sorry for the mistake, I just edited the previous answer. We are including progressively the new versions of PHP and other components in our stacks. At this moment, it seems that Drupal's turn has not yet arrived.
Currently, we are working hard to provide the latest version of our applications within days or even hours, but this applies to the main application (Drupal in this case), for other components we follow other policies due to the diversity of components inside our different stacks.
According to the official docs, PHP 7.0 is supported (but not recommended), it would be nice to know if you are facing any kind of issue related to the PHP version. In this case we can try to help you to solve it, if not, as I said previously, we will work during the next day on release a new Drupal revision including a new PHP version.
Carlos R. Hernández