@uppy/drag-drop: fix `undefined is not a function` TypeError (#3397)
@uppy/drag-drop: fix `undefined is not a function` TypeError (#3397)

* @uppy/drag-drop: fix typo in `handleDragOver`

Fixes: https://github.com/transloadit/uppy/issues/3385

* @uppy/drag-drop: fix typo in `handleDragLeave`
transloadit/uppy,transloadit/uppy,transloadit/uppy,transloadit/uppy