I'm trying to use the v4 react router, but the router always renders the initial path ('/').
I'm using 

`react: ^16.2.0`

`react-dom: ^16.2.0`

`react-router-dom: ^4.2.2`

When I try to render /#/account, it renders Home instead of Account.

```html
import React from "react"
import ReactDOM from "react-dom"
import { BrowserRouter as Router, Route } from 'react-router-dom'

import Home from "./components/Home/Home";
import Account from "./components/Account/Account";
import Layout from "./components/Layout";

const app = document.getElementById('app');

ReactDOM.render(
  <Router>
      <div>
        <Route exact path="/" render={() => (<div>Home</div>)} />
        <Route path="/account" render={() => (<div>Account</div>)} />
      </div>
  </Router>,
  app
)
```