Log new versions as they are found

[rethab]

• I have searched for similar issues
• I am using the latest version of npm-check-updates
• I am using node >= 10.17

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It would be nice if new versions of packages would be printed out as they are found. I have tried silly mode, but even then I can only see new versions once the entire process was successful.

Background: For better or worse, I'm am using a not only slow but also unstable registry. This means ncu -u often times out (even when increasing the timeout by 10x) or fails for some other reason late in the process. This means I don't have any new versions at all even though ncu made 90% progress.

By printing new versions as they are discovered, I could at least fix some of the dependencies manually :)

[raineorshine]

I agree! That would be a better user experience. It involves some structural changes to the package fetching pipeline. I think it would be a good idea to tackle this after the conversion to typescript (#888).

[raineorshine]

There is the annoying point that the cli columns won't line up if they are output individually. I think the cli will need to re-render the whole table each time a new version is retrieved.

[lyswhut]

My network connection official npm registry is unstable,
A large number of requests sent by ncu -u occasionally have some connection failures, causing ncu to stop working, so adding connection failure retries can help alleviate this problem.
same: #959