Update express requirement to 4.16.*
Update express requirement to 4.16.*

Updates the requirements on [express](https://github.com/expressjs/express) to permit the latest version.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/commits/4.16.2)
Idrinth/automatic-formatting,Idrinth/automatic-formatting