Feature Request

takeUntil and takeWhile does not include last value.

Please see this post, there are links in the comments to other users having similar problems.
https://stackoverflow.com/questions/51767204/rxjs-interval-with-takeuntil-to-publish-last-value

Describe the solution you'd like
Need option to get last value of takeUntil and takeWhile

Describe alternatives you've considered
Workaround is in stack overflow post but is not clean.