make sure npm dependencies are installed in the www folder

[zaggino]

required for adobe/brackets#12647

[ficristo]

I don't think this is correct.
In the dist folder I don't see any node_modules: Brackets build system doesn't copy them.
Running grunt build from Brackets repo should be sufficient to see it.
What I think is a better approach is to rename src/config.json to src/package.json and then run npm install --production inside the dist folder.
(After all I feel something is not right to see a npm command inside a task named git)

[zaggino]

This is fixed in adobe/brackets#12647
Commit adobe/brackets@4e17c98
Closing