chore: release 5.1.3 (#345)

🤖 I have created a release \*beep\* \*boop\* 
---
### [5.1.3](https://www.github.com/googleapis/nodejs-security-center/compare/v5.1.2...v5.1.3) (2020-11-25)


### Bug Fixes

* check for fetch on window ([#344](https://www.github.com/googleapis/nodejs-security-center/issues/344)) ([85c6d55](https://www.github.com/googleapis/nodejs-security-center/commit/85c6d55fa245fb2508423d2f0ba94f2e1c25c53f))
---


This PR was generated with [Release Please](https://github.com/googleapis/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": "^5.1.2"
+    "@google-cloud/security-center": "^5.1.3"
   },
   "devDependencies": {
     "chai": "^4.2.0",