Eslint dep

[evanmwillhite]

Companion PR to fourkitchens/emulsify#322. Must be merged and deployed at the same time.

• Moves ESLint from devdeps to full deps.
• Updates to Babel 7 from Babel 6
• Removes babel config from Emulsify Gulp into recommended config file
• Runs a custom Pattern Lab script through Babel

[amazingrando]

@evanmwillhite Code review looks good. Once someone functionally tests this will be good to go.