TypeError: __WEBPACK_IMPORTED_MODULE_2_ra_postgrest_client___default(...) is not a function

> 16 |     <Admin dataProvider={postgrestClient('http://localhost:3000')}>

import React, { Component } from 'react';
import {
  Admin,
  Resource
} from 'react-admin';
import postgrestClient from 'ra-postgrest-client';
import { UserList } from './user';
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
    <Admin dataProvider={postgrestClient('http://localhost:3000')}>
        <Resource name="user" list={UserList} />
    </Admin>
    );
  }
}

export default App;

{
  "name": "admin",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "aor-postgrest-client": "^0.2.3",
    "ra-postgrest-client": "^0.1.3",
    "react": "^16.4.0",
    "react-admin": "^2.0.2",
    "react-dom": "^16.4.0",
    "react-scripts": "1.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}