Upgrade webpack

[monte-hayward]

I'm gonna take a shot at this one in a fork, unless you want to, @RyanCCollins :)

One question: are there any packages known to be not-in-use? Just thinking of simplifying before ironing out dependencies and compatibilities.

Goal is to end up with 2.2.1 or better.
Migration path: https://webpack.js.org/guides/migrating/#module-preloaders-and-module-postloaders-was-removed

[monte-hayward]

Everything up-to-date with these exceptions:

$ ncu
Using /work/COURSEWARE/scalable-react-boilerplate/package.json
⸨░░░░░░░░░░░░░░░░░░⸩ ⠙ :
 apollo-client       0.5.26  →   0.9.0 
 jest                18.1.0  →  19.0.2 
 jest-cli            18.1.0  →  19.0.2 
 react-apollo        0.5.16  →  0.12.0 
 react-redux         ^4.4.5  →  ^5.0.3 
 redux-auth-wrapper  ^0.8.0  →  ^1.0.0 
 redux-form          ^5.2.5  →  ^6.5.0 
 redux-thunk         ^1.0.0  →  ^2.2.0 

reasoning:

• jest 19 would require snapshot rewrites
• latest apollo had an issue
• redux-form had a breaking change