Allow to use validate and export tree at NodeJS (for security)

[noam7700]

Is your feature request related to a problem? Please describe.
I want the ability for users to upload Tree to my backend that represents some complex DB query. I want to validate and export the tree to DB query at backend. Currently I can validate and export to DB Query at only frontend, which will allow users to query my DB freely w/o validation (which is bad for security).

Maybe Im doing it wrong, but importing Utils only import { Utils as QbUtils } from 'react-awesome-query-builder';, and also enabling "skipLibCheck" in tsconfig. but still Im receiving: Error: Cannot find module 'react'.

Describe the solution you'd like
Support using the library in NodeJS too only for defining Config (w/o render/factory functions, only formats functions configs), and for exporting to DB query.

Describe alternatives you've considered
maybe allow using the library at NodeJS by importing only part of the library. for example: import {Utils} from "raqb/nodejs;

[noam7700]

related to issue #331

[ukrbublik]

Now it's possible with version 6
Please see core package:
https://github.com/ukrbublik/react-awesome-query-builder/tree/master/packages/core