Bug: Typescript error, property shouldCopyOnOutsideDrop does not exists

[BilgeHanSolo-Mavenomics]

Repro

CodeSandbox example

@types/react-sortable-tree probably needs an update

[wuweiweiwu]

@BilgeHanSolo-Mavenomics definitely. they haven't been updated in a while

[acemac]

I've submitted a PR on DefinitelyTyped for this.

[wuweiweiwu]

@acemac awesome! Thanks a bunch!