chore: release 2.3.0 (#414)

🤖 I have created a release \*beep\* \*boop\* 
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## [2.3.0](https://www.github.com/googleapis/nodejs-kms/compare/v2.2.0...v2.3.0) (2021-01-08)


### Features

* **samples:** add integrity verification to Cloud KMS crypto samples ([#409](https://www.github.com/googleapis/nodejs-kms/issues/409)) ([d2897f6](https://www.github.com/googleapis/nodejs-kms/commit/d2897f681ae409b34a50b91ea718fa9e294895c5))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

Author: release-please[bot]

kms/package.json

@@ -14,7 +14,7 @@
     "test": "c8 mocha --recursive test/ --timeout=800000"
   },
   "dependencies": {
-    "@google-cloud/kms": "^2.1.4",
+    "@google-cloud/kms": "^2.3.0",
     "fast-crc32c": "^2.0.0",
     "jslint": "^0.12.1"
   },