fix(deps): update dependency @google-cloud/common to ^0.30.0 (#961)

renovate[bot] · JustinBeckwith · commit 23359346a7e7 · 2019-01-23T14:00:53.000-08:00
diff --git a/package.json b/package.json
@@ -95,7 +95,7 @@
     "typescript": "~3.1.0"
   },
   "dependencies": {
-    "@google-cloud/common": "^0.29.0",
+    "@google-cloud/common": "^0.30.0",
     "builtin-modules": "^3.0.0",
     "console-log-level": "^1.4.0",
     "continuation-local-storage": "^3.2.1",
