Bump express and browser-sync

Removes [express](https://github.com/expressjs/express). It's no longer used after updating ancestor dependency [browser-sync](https://github.com/BrowserSync/browser-sync). These dependencies need to be updated together.


Removes `express`

Updates `browser-sync` from 2.13.0 to 2.29.3
- [Release notes](https://github.com/BrowserSync/browser-sync/releases)
- [Changelog](https://github.com/BrowserSync/browser-sync/blob/master/changelog.js)
- [Commits](BrowserSync/browser-sync@v2.13.0...v2.29.3)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 
  dependency-type: indirect
- dependency-name: browser-sync
  dependency-version: 2.29.3
  dependency-type: direct:development
...

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Author: dependabot[bot]