message: Update README.md
  Updated Roadmap section
diff: @@ -258,6 +258,7 @@ $ npm run example
  - [ ] intercepting query parameters (via middleware)
  - [ ] intercepting url parameters (via `matchPath` operator)
  - [ ] more middlewares! (can think about moving `logger$` and `bodyParser$` outside core library)
  +- [ ] testing utilities
  - [ ] improved, dedicated documentation (to move outside README)
  ## Authors
  