fix(deps): update dependency @google-cloud/storage to v2 (#159)

Author: renovate[bot]

speech/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "@google-cloud/speech": "2.0.0",
-    "@google-cloud/storage": "^1.7.0",
+    "@google-cloud/storage": "^2.0.0",
     "node-record-lpcm16": "^0.3.0",
     "yargs": "^12.0.0"
   },