Better Lodash usage

[samselikoff]

In #77 we pulled in individual lodash packages instead of lodash-es but it's kinda lousy dev experience. Would love to get our setup better so we can just use lodash-es but get tree-shaking working!

[FLGMwt]

agreed, the extra modules to import and deps aren't super fun. I mostly worked on apps and not libs so I don't know if there's a difference, but I've used https://www.npmjs.com/package/babel-plugin-lodash in the past for the the same thing. Does that play nice w/ rollup'd packages? I'll spike it out to see if the bundle is the same

[samselikoff]

It really should come "for free" once we have our build setup working correctly. The problem was our UMD build had all of lodash. Would love to see what you come up with!

We're also talking about trying out tsdx because (a) our build setup is screwed up right now (b) it is a huge pain to work on it (c) we want to add typescript support eventually and that will just complicate things further.