Update return type of iterator_count and iterator_apply functions to 0|positive-int

[ricardoboss]

No description provided.

[orklah]

Can you please rebase on 4.x? commits on master will only be released in Psalm 5

[ricardoboss]

Should I reopen the PR targeting the 4.x branch?

[orklah]

You should follow those steps:

1. git rebase -i upstream/4.x (assuming your remote for this repo is named upstream)
2. resolve any conflict git tells you to (I don't expect any here)
3. once it's done git push --force
4. Come back here and next to the title of your PR, click on Edit and you'll be able to change the target of your PR to match with your rebase

[weirdan]

Thanks!