Fix imports

Author: ljwagerfield

src/UploadDropzone.tsx

@@ -1,6 +1,6 @@
 import { UploaderInterface, UploaderResult, UploaderOptions } from "uploader";
 import React, { useLayoutEffect } from "react";
-import { useElementRef } from "react-uploader/Utils";
+import { useElementRef } from "./Utils";
 
 interface Props {
   height?: string;

src/Utils.ts

@@ -1,5 +1,8 @@
 import { useCallback, useState } from "react";
 
+/**
+ * Unlike 'useRef', 'useElementRef' will trigger a rerender when the reference is updated.
+ */
 export function useElementRef(): [HTMLElement | undefined, (e: HTMLElement | null) => void] {
   const [element, setElement] = useState<HTMLElement | undefined>(undefined);
   const elementRef = useCallback((e: HTMLElement | null) => {