fix(deps): update dependency @google-cloud/storage to v4 (#311)

Author: renovate-bot

cloud-language/snippets/package.json

@@ -18,7 +18,7 @@
     "@google-cloud/automl": "^1.0.0",
     "mathjs": "^6.0.0",
     "@google-cloud/language": "^3.3.0",
-    "@google-cloud/storage": "^3.0.0",
+    "@google-cloud/storage": "^4.0.0",
     "yargs": "^14.0.0"
   },
   "devDependencies": {