fix(deps): update dependency google-auth-library to v5 (#702)

Renovate Bot · JustinBeckwith · commit 3a15956d310c · 2019-07-26T08:15:04.000-07:00
diff --git a/package.json b/package.json
@@ -61,7 +61,7 @@
     "arrify": "^2.0.0",
     "async-each": "^1.0.1",
     "extend": "^3.0.2",
-    "google-auth-library": "^3.0.0",
+    "google-auth-library": "^5.0.0",
     "google-gax": "^1.0.0",
     "is-stream-ended": "^0.1.4",
     "lodash.snakecase": "^4.1.1",
