chore: release 3.1.5 (#319)

🤖 I have created a release \*beep\* \*boop\*
---
### [3.1.5](https://www.github.com/googleapis/nodejs-containeranalysis/compare/v3.1.4...v3.1.5) (2021-06-30)


### Bug Fixes

* make request optional in all cases ([#318](https://www.github.com/googleapis/nodejs-containeranalysis/issues/318)) ([35e8196](https://www.github.com/googleapis/nodejs-containeranalysis/commit/35e81964f971d4272b0c14f4e8b6e790229ba803))
---


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]

packages/google-devtools-containeranalysis/CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/containeranalysis?activeTab=versions
 
+### [3.1.5](https://www.github.com/googleapis/nodejs-containeranalysis/compare/v3.1.4...v3.1.5) (2021-06-30)
+
+
+### Bug Fixes
+
+* make request optional in all cases ([#318](https://www.github.com/googleapis/nodejs-containeranalysis/issues/318)) ([35e8196](https://www.github.com/googleapis/nodejs-containeranalysis/commit/35e81964f971d4272b0c14f4e8b6e790229ba803))
+
 ### [3.1.4](https://www.github.com/googleapis/nodejs-containeranalysis/compare/v3.1.3...v3.1.4) (2021-05-25)
 
 

packages/google-devtools-containeranalysis/package.json

@@ -1,7 +1,7 @@
 {
   "repository": "googleapis/nodejs-containeranalysis",
   "name": "@google-cloud/containeranalysis",
-  "version": "3.1.4",
+  "version": "3.1.5",
   "author": "Google LLC",
   "description": "Container Analysis API client for Node.js",
   "main": "build/src/index.js",

packages/google-devtools-containeranalysis/samples/package.json

@@ -14,7 +14,7 @@
     "test": "mocha --timeout 100000 test/**.test.js"
   },
   "dependencies": {
-    "@google-cloud/containeranalysis": "^3.1.4",
+    "@google-cloud/containeranalysis": "^3.1.5",
     "@google-cloud/pubsub": "^2.0.0",
     "p-retry": "^4.1.0"
   },