Support useTopNode option

[joscmw95]

Wrote this because I wanted to do something that looks like GitHub token creator.

It does what was mentioned in #13, particularly the 2nd model:

2. Record upper-most nodes in checked. Here, we care about top-most checked nodes; the component needs to be intelligent enough to only record nodes that do not have a parent node checked. This is the model you are suggesting.

[mkaufman1]

What is the status on this? Can it be merged/released?

[zlobin-oleksii]

Any news?

[joscmw95]

The owner of this repository added the PR to the 1.6.0 milestone however no one is actively merging the code. I would advise anyone that wants to use this 'mode' now to use the fork I created. There is no clear documentation on usage but you could just add the useTopNode={true} parameter in the component and see the output.