CoroutineImpl seem to have been moved to another p...

# coroutines

[antonkeks]

CoroutineImpl seem to have been moved to another package between beta-18 and beta-38

[ilya.gorbunov]

antonkeks: That's correct, see https://discuss.kotlinlang.org/t/experimental-status-of-coroutines-in-1-1-and-related-compatibility-concerns/2236