Cannot find module 'jquery'

[xtuc]

Following the discussion from Rich-Harris/packd#42 (comment).

In https://github.com/jashkenas/backbone/blob/master/backbone.js#L26 jQuery is require'd in a TryCatch Statement which is probably fine on Node but fails to bundle.

I would suggest to add jquery in the dependencies of Backbone, but I understand that's not what you want and I'm not sure why we should do.

[jgonggrijp]

@xtuc Perhaps jQuery could be made a peer dependency. Would that help?