chore: release 3.20.0 (#570)

🤖 I have created a release \*beep\* \*boop\*
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## [3.20.0](https://www.github.com/googleapis/nodejs-asset/compare/v3.19.0...v3.20.0) (2021-10-19)


### Features

* Update osconfig v1 and v1alpha RecurringSchedule.Frequency with DAILY frequency ([#569](https://www.github.com/googleapis/nodejs-asset/issues/569)) ([af03fd5](https://www.github.com/googleapis/nodejs-asset/commit/af03fd5c4fba4a258acf4c0332991bcb619fa10b))
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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).

asset/snippets/package.json

@@ -15,7 +15,7 @@
  "test": "mocha --timeout 360000"
  },
  "dependencies": {
- "@google-cloud/asset": "^3.19.0",
+ "@google-cloud/asset": "^3.20.0",
  "@google-cloud/bigquery": "^5.5.0",
  "@google-cloud/compute": "^2.0.0",
  "@google-cloud/storage": "^5.0.0",