Require Node 16, and don't exit for scan failures

Changed

• Upgrade to Node 16
• Constrain Node to at least version 16
• If we fail to check a Bitbucket repo, report that and keep going
• If we fail to check a GitHub repo, report that and keep going

Fixed

• Update dependencies now that we're on Node 16
  • A more readable diff for what changed is here

Added

• List all dependencies (in a more readable format), and have make update also update that list

Included

• #89
• #91