chore: release 2.3.0 (#457)

🤖 I have created a release \*beep\* \*boop\* 
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## [2.3.0](https://www.github.com/googleapis/nodejs-dataproc/compare/v2.2.1...v2.3.0) (2021-01-14)


### Features

* adds style enum ([5762be7](https://www.github.com/googleapis/nodejs-dataproc/commit/5762be73d0b01f5abd7e7612b1efa94fabd6bf9e))
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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": "^2.2.1",
+    "@google-cloud/dataproc": "^2.3.0",
     "@google-cloud/storage": "^5.0.0"
   },
   "devDependencies": {