Bump npm from 7.0.10 to 7.18.1

Bumps [npm](https://github.com/npm/cli) from 7.0.10 to 7.18.1.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/CHANGELOG.md)
- [Commits](npm/cli@v7.0.10...v7.18.1)

---
updated-dependencies:
- dependency-name: npm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>