fix(deps): update dependency google-gax to ^0.25.0 (#94)

Author: renovate[bot]

packages/google-cloud-asset/package.json

@@ -40,7 +40,7 @@
     "fix": "eslint --fix '**/*.js'"
   },
   "dependencies": {
-    "google-gax": "^0.24.0",
+    "google-gax": "^0.25.0",
     "lodash.merge": "^4.6.0",
     "protobufjs": "^6.8.0"
   },