cli - custom-elements-manifest analyze does not terminate after running

[maybebot]

Checklist

• Did you run the analyzer with the --dev flag to get more information?
• Did you create a minimal reproduction in the playground?

Completing the items above will greatly improve triaging time of your issue.

Expected behavior
After running the custom-elements-manifest analyze I would expect the process to end, or to have an option that would make the process end.

Details
With a package.json:

{
  [...]
  "scripts": {
    [...]
    "manifest": "custom-elements-manifest analyze"
  }
}

after running

npm run manifest

I would expect the process to end.

During development I can easily end the process manually (CTRL+C or similar), but this becomes a problem if the command is part of a larger script, such as npm run build && npm run manifest && [...] where the process hangs.

Additionally, most non-watching npm commands tend to end their process.

Before trying to address the issue I wanted to bring it up here in case I'm missing something

In case this is the desired behavior a possible solution might also be behind a option such as --exit