Bump glob-parent and watchpack in /s2018

Bumps [glob-parent](https://github.com/gulpjs/glob-parent) and [watchpack](https://github.com/webpack/watchpack). These dependencies needed to be updated together.

Updates `glob-parent` from 3.1.0 to 5.1.2
- [Release notes](https://github.com/gulpjs/glob-parent/releases)
- [Changelog](https://github.com/gulpjs/glob-parent/blob/main/CHANGELOG.md)
- [Commits](gulpjs/glob-parent@v3.1.0...v5.1.2)

Updates `watchpack` from 1.6.0 to 1.7.5
- [Release notes](https://github.com/webpack/watchpack/releases)
- [Commits](webpack/watchpack@v1.6.0...v1.7.5)

---
updated-dependencies:
- dependency-name: glob-parent
  dependency-type: indirect
- dependency-name: watchpack
  dependency-type: indirect
...

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Author: dependabot[bot]