fix(deps): update dependency natural to v2 (#772)

Author: renovate-bot

vision/samples/package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "@google-cloud/vision": "^1.11.0",
     "mathjs": "^6.0.0",
-    "natural": "^1.0.0",
+    "natural": "^2.0.0",
     "pureimage": "^0.2.1",
     "redis": "^3.0.0",
     "yargs": "^15.0.0"