fix(deps): update dependency google-gax to ^0.25.0 (#195)

Author: renovate[bot]

packages/google-cloud-language/package.json

@@ -41,7 +41,7 @@
     "fix": "eslint --fix '**/*.js'"
   },
   "dependencies": {
-    "google-gax": "^0.24.0",
+    "google-gax": "^0.25.0",
     "lodash.merge": "^4.6.1"
   },
   "devDependencies": {