Expose individual functions

[emeeks]

I only use the force layout and the node generator, I don't use the render or the line drawing. If you could expose the individual functions so I could import only the functions I wanted like so:

import { forceLayout, nodeGenerator } from "labella"

That would make the library more efficient for integration into other libraries.

[Karankhatik]

I want to work on this can you please assign it to me