It doesn't work with styled components

[pedrokohler]

Bug Report

Describe the bug

It doesn't work with styled components. Simply no styling takes effect. I'm guessing it's because the className property passed to the component is not properly passed to the internal components.

Steps to reproduce

Do something like the code below

import styled from 'styled-components';
import { DropzoneArea as MuiDropZone } from 'material-ui-dropzone';
export const DropZoneArea = styled(MuiDropZone)`
  height: 100px;
  &.MuiDropzoneArea-textContainer{
    color: red;
  }
`;

You'll see that none of the styles are applied.

Expected behavior

Styles should be applied when using styled components.

Versions

• OS: Ubuntu
• Browser: Chrome
• @material-ui/core version: 4.11.4
• material-ui-dropzone version: 3.5.0
• styled-components version: 5.3.0

[vikash-del]

Use dropzoneClass prop to apply your styles.
Example:

This works fine.