chore(main): release 3.0.0 (#358)

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md
Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Benjamin E. Coe <bencoe@google.com>

Author: 3 people

datalabeling/package.json

@@ -14,7 +14,7 @@
     "test": "mocha --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/datalabeling": "^2.3.0"
+    "@google-cloud/datalabeling": "^3.0.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",