fix(deps): update dependency natural to v5 (#880)

Author: renovate-bot

packages/google-cloud-vision/samples/package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@google-cloud/vision": "^2.3.1",
-    "natural": "^4.0.0",
+    "natural": "^5.0.0",
     "pureimage": "^0.2.1",
     "redis": "^3.0.0",
     "yargs": "^16.0.0"