build(deps): bump @kubernetes/client-node in /cleaner

Bumps [@kubernetes/client-node](https://github.com/kubernetes-client/javascript) from 0.19.0 to 0.20.0.
- [Release notes](https://github.com/kubernetes-client/javascript/releases)
- [Changelog](https://github.com/kubernetes-client/javascript/blob/master/CHANGELOG.md)
- [Commits](kubernetes-client/javascript@0.19.0...0.20.0)

---
updated-dependencies:
- dependency-name: "@kubernetes/client-node"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

cleaner/package.json

@@ -10,7 +10,7 @@
   "author": "iteratec GmbH",
   "license": "Apache-2.0",
   "dependencies": {
-    "@kubernetes/client-node": "^0.19.0",
+    "@kubernetes/client-node": "^0.20.0",
     "jest-date-mock": "^1.0.8",
     "supertest": "^6.3.3",
     "winston": "^3.11.0"