chore: release 2.2.0 (#143)

🤖 I have created a release \*beep\* \*boop\* 
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## [2.2.0](https://www.github.com/googleapis/nodejs-game-servers/compare/v2.1.2...v2.2.0) (2021-01-09)


### Features

* adds style enumeration ([#142](https://www.github.com/googleapis/nodejs-game-servers/issues/142)) ([59f7332](https://www.github.com/googleapis/nodejs-game-servers/commit/59f7332fee754b11e8a395d19013cc78351e5659))
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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).

generated,README.md/package.json

@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/game-servers": "^2.1.2"
+    "@google-cloud/game-servers": "^2.2.0"
   },
   "devDependencies": {
     "c8": "^7.2.1",