Add API for use drag handle element

[jmas]

Is your feature request related to a problem? Please describe.
Currently I'm developing feature where I using drag handle element for drag and reorder by it.
Example:

Describe the solution you'd like
The same as here: http://clauderic.github.io/react-sortable-hoc/#/basic-configuration/drag-handle?_k=i5iz7y

Describe alternatives you've considered
react-sortable-hoc have less understandable API and it have issues with latest version of react.

Additional context
I provided it before.
Thank you for your solution. It's nice.

[waynevanson]

Refer to these docs for the API surface. Check out the handle property! https://github.com/SortableJS/Sortable