Bump lerna from 6.6.2 to 7.1.5

Bumps [lerna](https://github.com/lerna/lerna/tree/HEAD/packages/lerna) from 6.6.2 to 7.1.5.
- [Release notes](https://github.com/lerna/lerna/releases)
- [Changelog](https://github.com/lerna/lerna/blob/main/packages/lerna/CHANGELOG.md)
- [Commits](https://github.com/lerna/lerna/commits/v7.1.5/packages/lerna)

---
updated-dependencies:
- dependency-name: lerna
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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