Update express requirement to ^4.16.3 (#111)
Update express requirement to ^4.16.3 (#111)

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/4.16.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Innovate-Technologies/Cast,Innovate-Technologies/Cast,Innovate-Technologies/Cast