Signature of onFileDrop seems wrong

[ewalddieser]

onFileDrop expects a method with signature (files: File[]) but it actually passes a FileList.

In most cases it's maybe not even noticeable but you will get an error if you for example want to filter the files or call any other array methods on it.

[Frozen-byte]

this is a real problem if you use strict typing,
submitted a fix here: #1287