chore: release 2.0.0 (#38)

* updated CHANGELOG.md [ci skip]

* updated package.json [ci skip]

* updated samples/package.json

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

cloud-game-servers/snippets/package.json

@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/game-servers": "^1.1.0"
+    "@google-cloud/game-servers": "^2.0.0"
   },
   "devDependencies": {
     "c8": "^7.0.0",