Bump cross-fetch from 3.1.6 to 3.1.8

Bumps [cross-fetch](https://github.com/lquixada/cross-fetch) from 3.1.6 to 3.1.8.
- [Release notes](https://github.com/lquixada/cross-fetch/releases)
- [Changelog](https://github.com/lquixada/cross-fetch/blob/v3.1.8/CHANGELOG.md)
- [Commits](lquixada/cross-fetch@v3.1.6...v3.1.8)

---
updated-dependencies:
- dependency-name: cross-fetch
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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