Bump path-to-regexp, express and superstatic

Bumps [path-to-regexp](https://github.com/pillarjs/path-to-regexp), [express](https://github.com/expressjs/express) and [superstatic](https://github.com/firebase/superstatic). These dependencies needed to be updated together.

Updates `path-to-regexp` from 0.1.7 to 1.9.0
- [Release notes](https://github.com/pillarjs/path-to-regexp/releases)
- [Changelog](https://github.com/pillarjs/path-to-regexp/blob/master/History.md)
- [Commits](pillarjs/path-to-regexp@v0.1.7...v1.9.0)

Updates `express` from 4.18.2 to 4.21.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.2/History.md)
- [Commits](expressjs/express@4.18.2...4.21.2)

Updates `superstatic` from 9.0.3 to 9.1.0
- [Release notes](https://github.com/firebase/superstatic/releases)
- [Commits](firebase/superstatic@v9.0.3...v9.1.0)

---
updated-dependencies:
- dependency-name: path-to-regexp
  dependency-type: indirect
- dependency-name: express
  dependency-type: indirect
- dependency-name: superstatic
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]