Stay signed in option with cookie-session in express : <p>I would like to have a "Stay signed in" option such as the one provided by Gmail. 
This way, the user <strong>can decide</strong> if they want to keep the session open upon opening a new browser session after previously closing it.</p>

<p>Looking into the github issues I saw <a href="https://github.com/expressjs/cookie-session/issues/21#issuecomment-52973886">the cookie-session component doesn't provide a way to upate the <code>maxAge</code> property dynamilly</a>. </p>

<p>I'm wondering then if there's any way at all to achieve the "Stay signed in" feature with the <code>cookie-session</code> component.</p>

<p>It seems to me a basic feature for a component which is being downloaded <a href="https://www.npmjs.com/package/cookie-session">80K times a month</a>.</p>
