chore: release 2.4.1 (#468)

🤖 I have created a release \*beep\* \*boop\*
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### [2.4.1](https://www.github.com/googleapis/nodejs-kms/compare/v2.4.0...v2.4.1) (2021-06-25)


### Bug Fixes

* make request optional in all cases ([#466](https://www.github.com/googleapis/nodejs-kms/issues/466)) ([bba9a58](https://www.github.com/googleapis/nodejs-kms/commit/bba9a58b087c96ff66adbde8702599aac05fc4a1))
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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]

kms/package.json

@@ -14,7 +14,7 @@
     "test": "c8 mocha --recursive test/ --timeout=800000"
   },
   "dependencies": {
-    "@google-cloud/kms": "^2.4.0",
+    "@google-cloud/kms": "^2.4.1",
     "fast-crc32c": "^2.0.0",
     "jslint": "^0.12.1"
   },