chore: release 3.1.8 (#645)

🤖 I have created a release \*beep\* \*boop\*
---
### [3.1.8](https://github.com/googleapis/nodejs-dlp/compare/v3.1.7...v3.1.8) (2021-08-17)


### Bug Fixes

* **deps:** google-gax v2.24.1 ([#644](https://github.com/googleapis/nodejs-dlp/issues/644)) ([85847fa](https://github.com/googleapis/nodejs-dlp/commit/85847fa2df84bbe11ae7adaffe32c56a881e7546))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

dlp/package.json

@@ -15,7 +15,7 @@
     "test": "mocha system-test/*.test.js --timeout=600000"
   },
   "dependencies": {
-    "@google-cloud/dlp": "^3.1.7",
+    "@google-cloud/dlp": "^3.1.8",
     "@google-cloud/pubsub": "^2.0.0",
     "mime": "^2.3.1",
     "yargs": "^16.0.0"