Bump cacheable-request and @kubernetes/client-node in /packages/k8s (#66)

Removes [cacheable-request](https://github.com/jaredwray/cacheable-request). It's no longer used after updating ancestor dependency [@kubernetes/client-node](https://github.com/kubernetes-client/javascript). These dependencies need to be updated together.


Removes `cacheable-request`

Updates `@kubernetes/client-node` from 0.16.3 to 0.18.1
- [Release notes](https://github.com/kubernetes-client/javascript/releases)
- [Changelog](https://github.com/kubernetes-client/javascript/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kubernetes-client/javascript/commits)

---
updated-dependencies:
- dependency-name: cacheable-request
  dependency-type: indirect
- dependency-name: "@kubernetes/client-node"
  dependency-type: direct:production
...

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packages/k8s/package.json

@@ -16,7 +16,7 @@
     "@actions/core": "^1.9.1",
     "@actions/exec": "^1.1.1",
     "@actions/io": "^1.1.2",
-    "@kubernetes/client-node": "^0.16.3",
+    "@kubernetes/client-node": "^0.18.1",
     "hooklib": "file:../hooklib"
   },
   "devDependencies": {