Update: bump node-fetch from 2.6.7 to 2.6.8 (#66)

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.7 to 2.6.8.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.7...v2.6.8)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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