chore: release 1.9.0 (#144)

🤖 I have created a release \*beep\* \*boop\* 
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## [1.9.0](https://www.github.com/googleapis/nodejs-containeranalysis/compare/v1.8.0...v1.9.0) (2020-02-29)


### Features

* export protos in src/index.ts ([29af69b](https://www.github.com/googleapis/nodejs-containeranalysis/commit/29af69b2e1af8763ee892d9325d089e401198330))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

container-analysis/snippets/package.json

@@ -14,7 +14,7 @@
     "test": "mocha --timeout 100000 test/**.test.js"
   },
   "dependencies": {
-    "@google-cloud/containeranalysis": "^1.8.0",
+    "@google-cloud/containeranalysis": "^1.9.0",
     "@google-cloud/pubsub": "^1.0.0",
     "p-retry": "^4.1.0"
   },