Replace query syntax with a more complete MongoDB equivalent

[JamesMGreene]

Replace NeDB's quasi-MongoDB query syntax with the json-criteria module to get a full-blown and fully compatible MongoDB query syntax implementation.

Note that this module's README mentions the need to do the following:

// npm install babel --save
// Once at the entrypoint of your app.
require('babel/register')

However, note that this runtime registration can be avoided by doing something like the following:

1. npm install --save-dev babel-cli@latest
2. Add a "postinstall" script to the "package.json" file containing: cd node_modules && cd json-criteria && babel src -d lib && cd .. && cd ..

[JamesMGreene]

If at all possible, maintain basic compatibility with NeDB-based modules like:

• express-nedb-session
  • Probably cannot be done since this module internally loads NeDB rather than having it passed in.
• nedb-session-store
  • Cannot currently be done since this module internally loads NeDB rather than having it passed in.
    • However, since it is my module, I can refactor it to accept an incoming parameter of an NeDB instance or else lazy-load NeDB if not provided.
      • This may require a new major version release to honor SemVer if it cannot fully support backward compatibility

[JamesMGreene]

Another option is kofrasa/mingo, MongoDB query syntax for in-memory objects. 🤔