Update dev deps to latest and generate fresh package-lock file

[Ethan-Arrowood]

Description

This PR updates the dev dependencies and generates a new package-lock.json file for Travis to use in npm ci. It should remedy error in PR #8. Closes #12

Checklist for success

• [x] This change isn't already implemented by a pending pull request
• [x] This change is a child commit of a reasonably recent commit in the master branch
  • Requests need not be a single commit, but should be a linear sequence of commits (i.e. no merge commits in your PR)
• [x] All tests pass locally (see the testing section for more info)
• [x] All New behaviors or major functional changes have tests