Bump express and mo-dev (#240)

Bumps [express](https://github.com/expressjs/express) to 4.19.2 and updates ancestor dependency [mo-dev](https://github.com/dfinity/motoko-dev-server). These dependencies need to be updated together.


Updates `express` from 4.18.2 to 4.19.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.2...4.19.2)

Updates `mo-dev` from 0.12.0 to 0.13.0
- [Release notes](https://github.com/dfinity/motoko-dev-server/releases)
- [Commits](dfinity/motoko-dev-server@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: express
  dependency-type: indirect
- dependency-name: mo-dev
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>