Moves package dependencies

[coreymcollins]

Closes #563

DESCRIPTION

Moves some required dependencies to dependencies and keeps the rest in devDependencies in the package file.

SCREENSHOTS

OTHER

• Is this issue accessible? (Section 508/WCAG 2.0AA)
• Does this issue pass all the linting? (PHPCS, ESLint, SassLint)
• Does this pass CBT?

STEPS TO VERIFY

1. Check out the branch
2. Run npm install --production && npm run build
3. Load the site and verify everything is built as expected

DOCUMENTATION

I don't believe we'll need to update any documentation here.

[jrfoell]

Thanks @coreymcollins