Kotlin extension
Introduced Kotlin extension function test for Observable, Single, Completable and BlockingObservable.
Example: Observable.just("1").test().completed()
API change
Introduced has prefix to make API more natural. List of methods with new name
hasTerminalEvent
hasNoErrors
hasError
hasError
hasNoTerminalEvent
hasNoValues
hasValueCount
hasValues
hasValue
hasValuesAndClear