Socket.IO Express Session Middleware

This package, `socket.io-express-session`, provides middleware to integrate and share `express-session` instances with `socket.io`. It allows developers to access the same session object (`socket.handshake.session`) within Socket.IO connection handlers that they would normally access via `req.session` in an Express application. The package is extremely old, with its latest version (0.1.3) published over 10 years ago in September 2015. Due to its age, it is considered abandoned and does not support modern JavaScript module systems (ESM) or recent versions of `express-session` and `socket.io` without potential compatibility issues. Modern applications typically integrate `express-session` with `socket.io` directly by using the `sessionMiddleware` within `io.engine.use()` or `io.use()` with a custom wrapper, as shown in current Socket.IO documentation.