Typed property JiraCloud\Issue\IssueField::$labels must not be accessed before initialization

[neskodi]

When I have fetched some issues from JIRA and trying to access $issue->fields->labels I get "Typed property JiraCloud\Issue\IssueField::$labels must not be accessed before initialization"

(PHP version 8.2)

I've submitted a PR with a fix but I suggest you review other similar fields as well.

Cheers

[lesstif]

Hi @neskodi Thank you for your contribution.
I merged your PR(#69), but I'll release a new version after checking the work properly.