Replace deprecated / async-unsafe lifecycles

[bvaughn]

Replace componentWillMount, componentWillReceiveProps, and componentWillUpdate with async-safe lifecycles in advance of React 16.4 deprecation warnings. Use react-lifecycles-compat to ensure backwards compatibility.

Relates to reactjs/rfcs/pull/6

In-progress documentation available at reactjs/react.dev/pull/587 and reactjs/react.dev/pull/596

RFC at https://github.com/reactjs/rfcs/blob/master/text/0006-static-lifecycle-methods.md

[bvaughn]

FYI @TrySound, I'm picking this up for the weekend. Do you have any major structural changes in progress? And if not, could you hold off until I'm done with this upgrade?

[TrySound]

Awesome. No, I don't have. Only rollup, but I'm sure it's not related.

[bvaughn]

Sweet! Thanks for confirming. 👍