Fix input errors if attempting to borrow more than total cost of attendance

[marteki]

This fixes input errors if attempting to borrow more than total cost of attendance, and consolidates how our input elements are updated.

It also updates our NPM packages.

Additions

• Add gradPlusOverCost to available borrowing errors

Changes

• Update NPM packages
• Consolidate how we update input fields to prevent double triggering

Testing

Pull the branch down, and play with the input fields.

Review

• @mistergone @higs4281 @amymok

Checklist

• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows the standards laid out in the front end playbook
• Passes all existing automated tests
• New functions include new tests
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged
• Visually tested in supported browsers and devices
• Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)

[coveralls]

Coverage remained the same at 100.0% when pulling 4db48fd on over-coa-cap into db5db76 on master.

[higs4281]

👍 going crazy with too much in loans works for me.

[marteki]

Merging.