fix(deps): update dependency @google-cloud/common to ^0.23.0

Author: renovate[bot]

package.json

@@ -94,7 +94,7 @@
     "typescript": "~3.0.0"
   },
   "dependencies": {
-    "@google-cloud/common": "^0.20.3",
+    "@google-cloud/common": "^0.23.0",
     "builtin-modules": "^3.0.0",
     "continuation-local-storage": "^3.2.1",
     "extend": "^3.0.0",