v4.0.0

<a name"4.0.0">

4.0.0 (2017-04-26)

Features

• upgrade to RxJS 5 (#4) (9aec887f)

Breaking Changes

• upgrades all dependencies

(14fcc3a2)

• this commit upgrades flight-with-observable-state to RxJS version 5:
  https://github.com/ReactiveX/rxjs/blob/master/MIGRATION.md
  (9aec887f)