chore: release 2.5.0 (#485)

🤖 I have created a release \*beep\* \*boop\*
---
## [2.5.0](https://www.github.com/googleapis/nodejs-kms/compare/v2.4.4...v2.5.0) (2021-08-05)


### Features

* add support for HMAC, Variable Key Destruction, and GenerateRandom ([#484](https://www.github.com/googleapis/nodejs-kms/issues/484)) ([c207423](https://www.github.com/googleapis/nodejs-kms/commit/c207423806e36057d74244e1c79294f595e5a740))
---


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": "^2.4.4",
+    "@google-cloud/kms": "^2.5.0",
     "fast-crc32c": "^2.0.0",
     "jslint": "^0.12.1"
   },