chore: release 5.4.0 (#411)

🤖 I have created a release \*beep\* \*boop\*
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## [5.4.0](https://www.github.com/googleapis/nodejs-security-center/compare/v5.3.5...v5.4.0) (2021-07-30)


### Features

* add finding_class and indicator fields in Finding ([#409](https://www.github.com/googleapis/nodejs-security-center/issues/409)) ([d0abd01](https://www.github.com/googleapis/nodejs-security-center/commit/d0abd013b359b1876c16e7f4ee6b8c873acc5014))
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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).

security-center/snippets/package.json

@@ -14,7 +14,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@google-cloud/pubsub": "^2.0.0",
-    "@google-cloud/security-center": "^5.3.5"
+    "@google-cloud/security-center": "^5.4.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",