chore(main): release 2.0.0 (#142)

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

Author: release-please[bot]

workflows/package.json

@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/workflows": "^1.4.0"
+    "@google-cloud/workflows": "^2.0.0"
   },
   "devDependencies": {
     "c8": "^7.3.0",