Handle multiple waitUntil at the same time without conflicts

[maury91]

With these corrections now is possible to write code like this one:

await Promise.all([
  dockerCloud.waitUntilContainerIsStopped(containerA),
  dockerCloud.waitUntilContainerIsStopped(containerB)
])

[vivanov1410]

Is it ready to be reviewed?

[maury91]

Yes, it is, on top of this solution, in another branch, I have a more reliable one ( adds a periodical check to the resource to avoid cases where a message got missed ), I'm using that on staging from 2 weeks and never given me an error.

I've discovered that sometimes a message can be missed ( is really rare, happens less than the 1% of the messages )

I clean up the other branch and make a new pull request ( for the extra functionality ).
The only difference in the other branch is the name of the package ( I needed to upload it on NPM )

[vivanov1410]

Sounds good, that would be great. Thanks for an extra effort, appreciate it 👍

[maury91]

I have cleaned the other branch, now in this pull request are present all the features I've said in the other comment.