fix(deps): update dependency google-auth-library to v5 (#453)

Renovate Bot · JustinBeckwith · commit 755635cb5eb2 · 2019-07-26T08:15:27.000-07:00
diff --git a/package.json b/package.json
@@ -38,7 +38,7 @@
     "duplexify": "^3.6.0",
     "ent": "^2.2.0",
     "extend": "^3.0.2",
-    "google-auth-library": "^4.0.0",
+    "google-auth-library": "^5.0.0",
     "retry-request": "^4.0.0",
     "teeny-request": "^4.0.0"
   },
