chore(deps-dev): bump @nx/plugin from 19.6.1 to 20.2.2

Bumps [@nx/plugin](https://github.com/nrwl/nx/tree/HEAD/packages/plugin) from 19.6.1 to 20.2.2.
- [Release notes](https://github.com/nrwl/nx/releases)
- [Commits](https://github.com/nrwl/nx/commits/20.2.2/packages/plugin)

---
updated-dependencies:
- dependency-name: "@nx/plugin"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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