Created by: callummr
Fixes #3349 (closed)
Output when template doesn't contain a .template.dependencies.json is same as before.
When template does contain .template.dependencies.json, they're installed in to the new project as I imagine was the case at some point in the past.
I extracted the call to crossSpawn with error handling since it was gonna be the same 5 lines twice, don't know if that was overzealous? Hopefully this is all good.
Cheers