Use iterator for `itemKey`

[seansean11]

I'm working on a list of todos that are stored in localStorage as an array of objects. Instead of having to try to create a unique itemKey property on each of the todo objects, I'd like to leverage the iterator of my Reorder list. Is this possible?

[JakeSidSmith]

I had fixed this in another experimental branch whereby you could pass a function as the itemKey (which you could then use to return a suitable key), but this has since become unnecessary due to a re-write I'm working on: #71

[JakeSidSmith]

Update: just released 3.0.0-alpha.0 on npm. I'd suggest checking out this version, it should be far more stable than the existing release, fixes a lot of bugs, and adds the ability to drag between lists. :)

See the readme after installation, there's been a considerable change to the interface.