chore: release 2.4.3 (#505)

🤖 I have created a release \*beep\* \*boop\*
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### [2.4.3](https://www.github.com/googleapis/nodejs-dataproc/compare/v2.4.2...v2.4.3) (2021-06-29)


### Bug Fixes

* **deps:** google-gax v2.17.0 with mTLS ([#508](https://www.github.com/googleapis/nodejs-dataproc/issues/508)) ([e03b476](https://www.github.com/googleapis/nodejs-dataproc/commit/e03b47670de476c14a48b99cbb8c0dcd2c0c813c))
* make request optional in all cases ([#504](https://www.github.com/googleapis/nodejs-dataproc/issues/504)) ([c14a8a8](https://www.github.com/googleapis/nodejs-dataproc/commit/c14a8a8dc6d672cc05b23cf255486be4b865ac6e))
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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]

dataproc/package.json

@@ -14,7 +14,7 @@
     "test": "mocha system-test --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/dataproc": "^2.4.2",
+    "@google-cloud/dataproc": "^2.4.3",
     "@google-cloud/storage": "^5.0.0"
   },
   "devDependencies": {