chore: release 2.1.0 (#160)

🤖 I have created a release \*beep\* \*boop\* 
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## [2.1.0](https://www.github.com/googleapis/nodejs-datacatalog/compare/v2.0.0...v2.1.0) (2020-06-16)


### Features

* add order field to TagField and TagTemplateField ([#157](https://www.github.com/googleapis/nodejs-datacatalog/issues/157)) ([70c23c2](https://www.github.com/googleapis/nodejs-datacatalog/commit/70c23c2b609bd24901dc902090e23fbf92b55895))
* move ts target to es2018 from es2016 ([#172](https://www.github.com/googleapis/nodejs-datacatalog/issues/172)) ([e354dde](https://www.github.com/googleapis/nodejs-datacatalog/commit/e354ddeeeedd3e106c50ed579075f23c9d9c5bb5))
* promote library to GA ([#177](https://www.github.com/googleapis/nodejs-datacatalog/issues/177)) ([ac11090](https://www.github.com/googleapis/nodejs-datacatalog/commit/ac110906b723f362024318295e3de6743c905b7e))


### Bug Fixes

* proper fallback option handling ([51df672](https://www.github.com/googleapis/nodejs-datacatalog/commit/51df6721306ab6d2d9bf6919b0f3f432ca85b4ab))
* regenerate unit tests ([#163](https://www.github.com/googleapis/nodejs-datacatalog/issues/163)) ([4593117](https://www.github.com/googleapis/nodejs-datacatalog/commit/45931176d266d364e0508039cf6a4e284ad2923d))
* synth.py clean up for multiple version ([#167](https://www.github.com/googleapis/nodejs-datacatalog/issues/167)) ([c799604](https://www.github.com/googleapis/nodejs-datacatalog/commit/c799604b2d29269006ff39748afb78302ce46ca2))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

Author: release-please[bot]

datacatalog/snippets/package.json

@@ -15,7 +15,7 @@
     "test": "mocha --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/datacatalog": "^2.0.0"
+    "@google-cloud/datacatalog": "^2.1.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",