timeout operator

[vitaly-t]

New operator timeout that ends iteration after a specified number of milliseconds:

timeout(ms: number)

@RebeccaStevens What do you think? 😉

UPDATE

Previously, I thought this was achievable via operator stop, but then I realized it would not account for the time spent getting the first value, so it's no good.

This new operator simplifies it a lot, and it accounts for the first iteration value also.

[vitaly-t]

Added implementation in branch timeout ;)

It just needs some tests + docs, to finish fully.

[vitaly-t]

I'm now thinking about, maybe, adding a second parameter - optional callback that's called only when the timeout was triggered, so the timeout event can be logged, for instance.

[vitaly-t]

The operator has been fully finished, and released with v2.0.0-beta.8