build(deps-dev): bump lerna from 3.17.0 to 3.18.0

Bumps [lerna](https://github.com/lerna/lerna/tree/HEAD/core/lerna) from 3.17.0 to 3.18.0.
- [Release notes](https://github.com/lerna/lerna/releases)
- [Changelog](https://github.com/lerna/lerna/blob/master/core/lerna/CHANGELOG.md)
- [Commits](https://github.com/lerna/lerna/commits/v3.18.0/core/lerna)

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

Author: dependabot-preview[bot]