Bump ms, browser-sync and serve-index

Bumps [ms](https://github.com/vercel/ms) to 2.0.0 and updates ancestor dependencies [ms](https://github.com/vercel/ms), [browser-sync](https://github.com/BrowserSync/browser-sync) and [serve-index](https://github.com/expressjs/serve-index). These dependencies need to be updated together.


Updates `ms` from 0.7.1 to 2.0.0
- [Release notes](https://github.com/vercel/ms/releases)
- [Commits](vercel/ms@0.7.1...2.0.0)

Updates `browser-sync` from 2.24.4 to 2.27.11
- [Release notes](https://github.com/BrowserSync/browser-sync/releases)
- [Changelog](https://github.com/BrowserSync/browser-sync/blob/master/CHANGELOG.md)
- [Commits](BrowserSync/browser-sync@v2.24.4...v2.27.11)

Updates `serve-index` from 1.8.0 to 1.9.1
- [Release notes](https://github.com/expressjs/serve-index/releases)
- [Changelog](https://github.com/expressjs/serve-index/blob/master/HISTORY.md)
- [Commits](expressjs/serve-index@v1.8.0...v1.9.1)

---
updated-dependencies:
- dependency-name: ms
  dependency-type: indirect
- dependency-name: browser-sync
  dependency-type: direct:development
- dependency-name: serve-index
  dependency-type: indirect
...

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Author: dependabot[bot]