Production should not include so many packages!

[farfromrefug]

if i had node-pre-gyp to my modules it has 30Mo!!!!
I am ok with that when i am building my app.
But that should not be the case in prod.
In prod the only thing you need from node-pre-gyp is find
As an example i created a fork of node-pre-gyp which i called node-pre-gyp-prod
Now in my native modules i put node-pre-gyp as a dev dependency and ``node-pre-gyp-prodas a dependency. Also when i need to require my bindings i now usenode-pre-gyp-prod```.
You can look at my fork of ```node-usb``` as an example.

This could and SHOULD be handled by node-pre-gyp. You simply need to put all the dependencies as dev dependencies.
Please make that change for everyone to profit from this!

[springmeyer]

See #340