fix(deps): update dependency @google-cloud/common to ^0.27.0

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
     "presystem-test": "npm run compile"
   },
   "dependencies": {
-    "@google-cloud/common": "^0.26.0",
+    "@google-cloud/common": "^0.27.0",
     "@google-cloud/promisify": "^0.3.0",
     "arrify": "^1.0.1",
     "extend": "^3.0.1",