feat(library): make outputs accessible for all steps

[Vampire]

fixes #1587

[krzema12]

Thanks! :)

[krzema12]

@Vampire BTW, no need to work with the fork - you have write perms to this repo.

[Vampire]

Yeah, I know, but I usually hate pulling from repos where everytime I get dozens of branches like gradle/gradle, so I usually tend to use fork everywhere even if I have write permission.

Only exception is, where I use Graphite as it does not yet support the forked-pr flow, but you did not enable the free subscription yet.

And it is not really more effort, I either way just do gh pr create and select one line or the other :-)