chore(deps): update dependency google-auth-library to v8 (GoogleCloudPlatform#145)

Co-authored-by: Alexander Fenster <fenster@google.com>

Author: renovate-bot

cloudprober/package.json

@@ -7,7 +7,7 @@
     "@google-cloud/error-reporting": "^2.0.0",
     "argparse": "^2.0.0",
     "bluebird": "^3.5.2",
-    "google-auth-library": "^7.0.0",
+    "google-auth-library": "^8.0.0",
     "google-protobuf": "^3.6.1",
     "grpc": "^1.15.1",
     "grpc-tools": "^1.6.6"

package.json

@@ -38,7 +38,7 @@
     "@grpc/proto-loader": "^0.6.2",
     "@google-cloud/spanner": "^5.12.0",
     "c8": "^7.7.2",
-    "google-auth-library": "^7.3.0",
+    "google-auth-library": "^8.0.0",
     "google-gax": "^2.14.1",
     "google-protobuf": "^3.17.1",
     "grpc": "^1.24.10",