chore: release 3.1.6 (#325)

🤖 I have created a release \*beep\* \*boop\*
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### [3.1.6](https://www.github.com/googleapis/nodejs-containeranalysis/compare/v3.1.5...v3.1.6) (2021-07-01)


### Bug Fixes

* **deps:** require google-gax v2.17.0 ([#322](https://www.github.com/googleapis/nodejs-containeranalysis/issues/322)) ([3c841c0](https://www.github.com/googleapis/nodejs-containeranalysis/commit/3c841c05e58e128080384321e1145d56c4b94cdf))
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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]

container-analysis/snippets/package.json

@@ -14,7 +14,7 @@
     "test": "mocha --timeout 100000 test/**.test.js"
   },
   "dependencies": {
-    "@google-cloud/containeranalysis": "^3.1.5",
+    "@google-cloud/containeranalysis": "^3.1.6",
     "@google-cloud/pubsub": "^2.0.0",
     "p-retry": "^4.1.0"
   },