chore: release 4.2.5 (#589)

🤖 I have created a release \*beep\* \*boop\*
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### [4.2.5](https://www.github.com/googleapis/nodejs-language/compare/v4.2.4...v4.2.5) (2021-06-22)


### Bug Fixes

* make request optional in all cases ([#588](https://www.github.com/googleapis/nodejs-language/issues/588)) ([878d365](https://www.github.com/googleapis/nodejs-language/commit/878d365dd0fba24ac58dcc80939e250c77d8cb53))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

Author: release-please[bot]

cloud-language/snippets/package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@google-cloud/automl": "^2.0.0",
     "mathjs": "^9.0.0",
-    "@google-cloud/language": "^4.2.4",
+    "@google-cloud/language": "^4.2.5",
     "@google-cloud/storage": "^5.0.0",
     "yargs": "^16.0.0"
   },