chore(deps): bump @kubernetes/client-node from 0.14.3 to 0.15.0

Bumps [@kubernetes/client-node](https://github.com/kubernetes-client/javascript) from 0.14.3 to 0.15.0.
- [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/compare/0.14.3...0.15.0)

---
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>

plugins/kubernetes-backend/package.json

@@ -36,7 +36,7 @@
     "@backstage/config": "^0.1.5",
     "@backstage/plugin-kubernetes-common": "^0.1.2",
     "@google-cloud/container": "^2.2.0",
-    "@kubernetes/client-node": "^0.14.0",
+    "@kubernetes/client-node": "^0.15.0",
     "@types/express": "^4.17.6",
     "aws-sdk": "^2.840.0",
     "aws4": "^1.11.0",

plugins/kubernetes-common/package.json

@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "@backstage/catalog-model": "^0.9.0",
-    "@kubernetes/client-node": "^0.14.0"
+    "@kubernetes/client-node": "^0.15.0"
   },
   "devDependencies": {
     "@backstage/cli": "^0.7.0"

plugins/kubernetes/package.json

@@ -37,7 +37,7 @@
     "@backstage/plugin-catalog-react": "^0.3.0",
     "@backstage/plugin-kubernetes-common": "^0.1.2",
     "@backstage/theme": "^0.2.8",
-    "@kubernetes/client-node": "^0.14.0",
+    "@kubernetes/client-node": "^0.15.0",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",