message: chore(publish): 5.5.0-beta.4
diff: {
  "name": "@reactivex/rxjs",
  - "version": "5.5.0-beta.3",
  + "version": "5.5.0-beta.4",
  "description": "Reactive Extensions for modern JavaScript",
  "main": "index.js",
  "config": {
  