chore: release 2.0.0 (#92)

🤖 I have created a release \*beep\* \*boop\* 
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## [2.0.0](https://www.github.com/googleapis/nodejs-cloudbuild/compare/v1.5.0...v2.0.0) (2020-06-11)


### ⚠ BREAKING CHANGES

* The library now supports Node.js v10+. The last version to support Node.js v8 is tagged legacy-8 on NPM.

### Features

* add time-to-live in a queue for builds ([04e3387](https://www.github.com/googleapis/nodejs-cloudbuild/commit/04e3387af33a7ab39eb0c4df47ce08026507b499))
* check status of long running operation by its name ([#114](https://www.github.com/googleapis/nodejs-cloudbuild/issues/114)) ([7b50a74](https://www.github.com/googleapis/nodejs-cloudbuild/commit/7b50a74c098e782393f92140a37e3bd26f45e77d))
* drop node8 support, support for async iterators ([#91](https://www.github.com/googleapis/nodejs-cloudbuild/issues/91)) ([74a195d](https://www.github.com/googleapis/nodejs-cloudbuild/commit/74a195d5cdf63dab1ac3d0d52ef42e1254ab3a2e))
* improve support for x-goog-request-params ([#111](https://www.github.com/googleapis/nodejs-cloudbuild/issues/111)) ([e08d640](https://www.github.com/googleapis/nodejs-cloudbuild/commit/e08d64017e059c911ebe55055c26a0ab76481d86))
* move ts target to es2018 from es2016 ([#121](https://www.github.com/googleapis/nodejs-cloudbuild/issues/121)) ([59c5477](https://www.github.com/googleapis/nodejs-cloudbuild/commit/59c547744519ef9e8d073ea3ecdb81248176a71a))


### Bug Fixes

* remove eslint, update gax, fix generated protos, run the generator ([#100](https://www.github.com/googleapis/nodejs-cloudbuild/issues/100)) ([aafb9cc](https://www.github.com/googleapis/nodejs-cloudbuild/commit/aafb9cc7745b4d5d6dce58f17763f76379af733f))
* synth.py clean up for multiple version ([#115](https://www.github.com/googleapis/nodejs-cloudbuild/issues/115)) ([aa7d99b](https://www.github.com/googleapis/nodejs-cloudbuild/commit/aa7d99b9c02267808cac07f7691f5ce62f06ca14))
---


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

cloudbuild/package.json

@@ -15,7 +15,7 @@
     "test": "c8 mocha system-test --timeout=800000"
   },
   "dependencies": {
-    "@google-cloud/cloudbuild": "^1.5.0"
+    "@google-cloud/cloudbuild": "^2.0.0"
   },
   "devDependencies": {
     "c8": "^7.0.0",