v3.0.0

• Refactor with React Hooks (react >= 16.8.0 | react-dom >= 16.8.0).
• Replace ReactDOM .unstable_renderSubtreeIntoContainer with ReactDOM.createPortal.
• Add downloadInNewWindow , whether to download in a new window.
• Add showTotal, whether to display the total number and range.
• css in js, no longer need to import styles.