fix(deps): bump express and @types/express

Bumps [express](https://github.com/expressjs/express) and [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express). These dependencies needed to be updated together.

Updates `express` from 4.18.1 to 4.21.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.0/History.md)
- [Commits](expressjs/express@4.18.1...4.21.0)

Updates `@types/express` from 4.17.13 to 4.17.21
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/express"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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