v2.0.0
* remove deprecated, update deps, refactor * take out helper to separate file * update prettier config * remove xstream and @cycle/run from deps * apply prettier in test * fix tests tsconfig rootDir * re-add xstream to deps
* remove deprecated, update deps, refactor * take out helper to separate file * update prettier config * remove xstream and @cycle/run from deps * apply prettier in test * fix tests tsconfig rootDir * re-add xstream to deps