How to use in an es6 app? 

Hi looks like a nice collection here! I was trying to use the d3 sankey but am not sure how to import it in my app. I'm using es6, so thought that i could do
`import d3Plugins from 'd3-plugins-dist`
and then to use the sankey
`d3Plugins.mbostock.sankey()`

But it seems that doesn't work, am I missing something? Thanks!