Hoist devDeps with Lerna

[timdorr]

Redo of #4436
Fixes #4362

beta.36 was pushed with lerna/lerna#566, which should fix the issue we were getting on install.

[timdorr]

Welp...

[pshrmn]

Should the react-router-native tests even be run by TravisCI?

[timdorr]

Yeah, they can be. They're just sanity checks for now: https://github.com/ReactTraining/react-router/blob/v4/packages/react-router-native/__tests__/index.ios.js

[kwelch]

Would excluding hep at all? I cannot see what the failure was, but there are some settings in hoist.

[timdorr]

I did that for react native ("nohoist": "react-native"), but that doesn't appear to be sufficient. If we end up excluding enough stuff, I'm not sure of the benefits of hoisting at all :/

[mjackson]

react-router-native is a special little unicorn. I'm thinking about kicking it out of the monorepo and telling it to go live by itself in another repo...