install size bloat for inquirer@5

[bugzpodder]

Since Inquirer upgraded from rxjs-lite v4 to rxjs V5/6, the install size quadrupled from 7MB to 25MB.
Part of the reason is because of the way rxjs bundles (ReactiveX/rxjs#3334) but even if we do not account for src/ it is is still a 17MB dependency.

inquirer@5 is used by create-react-app@2 and eslint@5 and we are trying to see if there is anyway to reduce the install size and still use this dependency.
facebook/create-react-app#3880
eslint/eslint#10404

[SBoudrias]

Anyone has a suggestion on how to reduce rxjs size? We made the choice to use rxjs a long time ago, but it's been causing file size issues for a long time now...

[imhoffd]

Wait for https://tc39.github.io/proposal-observable? 😂

On a more serious note, it'd be possible to do a massive refactor of Inquirer to have the "core" be event-based, and then have inquirerjs-reactive or something for those who wish to use the reactive interface. Just a lot of work.

This library is depended upon by Facebook, ESLint, Vue, Ionic, Yeoman, and likely many more big names. Could we all come together and help? I'd be happy to give more hours of my time. I can't promise anything related to sponsorship, though.

[frangio]

Please reopen this issue.

[SBoudrias]

If anyone wants to help, there's an on-going effort to refactor the core without rxjs who's the very large dependency.

#685