Greenkeeper support for nested package.json

[jamesplease]

Ideally Greenkeeper would be able to peek into the templates directory and see the package.json in there. It can't right now, but I figured I'd open this issue so I can keep track of figuring that out eventually.

The feature is being tracked upstream here:

greenkeeperio/greenkeeper#139

[jamesplease]

In the meantime, I'm going to do a manual thing. I'm going to set up a new project with this boilerplate and make sure I keep the versions in sync whenever greenkeeper posts updates there :P

[jamesplease]

The project has been set up here: https://github.com/jmeas/track-babel-boilerplate-updates

Just to be clear, the way it works is that I've set up Greenkeeper over there. So Greenkeeper will PR updates there, and then I'll make sure they work and make the changes here. Indirect, but hey, it works.