Add support for `SessionStore.touch`

[segevfiner]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

express-session added a SessionStore.touch method that is used by session stores to reset session idle/last used times and avoiding having to update them at every session. Support this method the same way as supported by express-session when supported by the provided session store

Motivation

https://www.npmjs.com/package/connect-mongo#lazy-session-update

Example

https://www.npmjs.com/package/connect-mongo#lazy-session-update