Does not support mongoose 7 because support for callbacks removed

[bmiller59]

node-restful was written using callbacks, and mongoose 7 no longer supports callbacks. I have fixed this situation for our app.

If you have node-restful in your app and cannot easily remove it, you may find this gist helpful. https://gist.github.com/bmiller59/98535e9fe8aff982932ff82ffa639cd6