Fix security issues with old packages in use

[geerlingguy]

GitHub is alerting me to some... I updated packages a couple days ago but that just led to more vulns being detected because of an old version of Mocha. I'll update that and git it working.

[geerlingguy]

Ran into this fun little issue with the Mocha upgrade: mochajs/mocha#3044

Had to set my test to have --exit (not going to spend the time getting the server connection to close properly on this little demo app):

{
  ...
  "scripts": {
    "test": "mocha test --exit"
  },
}