chore(deps-dev): bump the lerna group across 1 directory with 2 updates

Bumps the lerna group with 2 updates in the / directory: [lerna](https://github.com/lerna/lerna/tree/HEAD/packages/lerna) and [nx](https://github.com/nrwl/nx/tree/HEAD/packages/nx).


Updates `lerna` from 8.1.8 to 8.1.9
- [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/v8.1.9/packages/lerna)

Updates `nx` from 19.8.4 to 20.2.1
- [Release notes](https://github.com/nrwl/nx/releases)
- [Commits](https://github.com/nrwl/nx/commits/20.2.1/packages/nx)

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

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