chore: release 5.7.0 (#439)

🤖 I have created a release \*beep\* \*boop\*
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## [5.7.0](https://www.github.com/googleapis/nodejs-security-center/compare/v5.6.0...v5.7.0) (2021-11-15)


### Features

* Added mute related APIs, proto messages and fields ([#438](https://www.github.com/googleapis/nodejs-security-center/issues/438)) ([d432649](https://www.github.com/googleapis/nodejs-security-center/commit/d432649fed31f92a6048769b6b889666f5b9cced))
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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]

security-center/snippets/package.json

@@ -14,7 +14,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@google-cloud/pubsub": "^2.0.0",
-    "@google-cloud/security-center": "^5.6.0"
+    "@google-cloud/security-center": "^5.7.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",