Merge branch 'develop' of https://github.com/grandnode/grandnode into…

… develop

Update third party libraries to latest version

Added new field to category simple model - imageUrl

Replaced preview.jpg file

Set version 4.20.01

Minor fix - upload picture to product (admin panel)

Refactoring - command/query separation

Implemented "Powered By" by Middleware

Plugin ShippingPoint not placed on the docker.

Release-4.00