Updated PJC and json-api-client to latest

[srallen]

Staging branch URL: https://pr-5561.pfe-preview.zooniverse.org

Updated PJC and json-api-client to the release candidates

Required Manual Testing

• Does the non-logged in home page render correctly?
• Does the logged in home page render correctly?
• Does the projects page render correctly?
• Can you load project home pages?
• Can you load the classification page?
• Can you submit a classification?
• Does talk load correctly?
• Can you post a talk comment?

Review Checklist

• Does it work in all major browsers: Firefox, Chrome, Edge, Safari?
• Does it work on mobile?
• Can you rm -rf node_modules/ && npm install and app works as expected?
• If the component is in coffeescript, is it converted to ES6? Is it free of eslint errors? Is the conversion its own commit?
• Are the tests passing locally and on Travis?

Optional

• Have you replaced any ChangeListener or PromiseRenderer components with code that updates component state?
• If changes are made to the classifier, does the dev classifier still work?
• Have you resized and compressed any image you've added?
• Have you added in flow type annotations?
• Have you followed the Springer guidelines for commit messages?

[coveralls]

Coverage decreased (-0.07%) to 49.167% when pulling cab0e00 on update-pjc into e52b9f3 on master.

[eatyourgreens]

Looks good to me. I can authenticate, and make authenticated requests, against both the staging and production APIs.

Tested on production with https://pr-5561.pfe-preview.zooniverse.org/projects/r-dot-bains/rodent-little-brother-secret-lives-of-mice/classify?env=production