chore: release 4.3.0 (#611)

🤖 I have created a release \*beep\* \*boop\*
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## [4.3.0](https://www.github.com/googleapis/nodejs-language/compare/v4.2.9...v4.3.0) (2021-08-23)


### Features

* turns on self-signed JWT feature flag ([#610](https://www.github.com/googleapis/nodejs-language/issues/610)) ([461baca](https://www.github.com/googleapis/nodejs-language/commit/461bacad4c1c2216e39622b3f82ef634a3665956))
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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).

cloud-language/snippets/package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@google-cloud/automl": "^2.0.0",
     "mathjs": "^9.0.0",
-    "@google-cloud/language": "^4.2.9",
+    "@google-cloud/language": "^4.3.0",
     "@google-cloud/storage": "^5.0.0",
     "yargs": "^16.0.0"
   },