move types/aws4 to devDeps

plugins/kubernetes-backend/package.json

@@ -36,7 +36,6 @@
     "@backstage/catalog-model": "^0.7.0",
     "@backstage/config": "^0.1.2",
     "@kubernetes/client-node": "^0.13.2",
-    "@types/aws4": "^1.5.1",
     "@types/express": "^4.17.6",
     "aws4": "^1.11.0",
     "compression": "^1.7.4",
@@ -53,6 +52,7 @@
   },
   "devDependencies": {
     "@backstage/cli": "^0.4.7",
+    "@types/aws4": "^1.5.1",
     "supertest": "^4.0.2"
   },
   "files": [