8.2
[Notifier] Add support for `confirm` option in Slack buttons API
Merge branch '7.3' into 7.4
Add PR template and auto-close PR on subtree split repositories
added missing gitattributes and gitignore
Update license years (last time)
Add call to backers in README files
CS fixes
Use CPP where possible
Merge branch '6.4' into 7.4
Narrow existing return types on private/internal/final/test methods
[Notifier] Allow to update Slack messages
Bump to php >= 8.4.1
Update XSD references in phpunit.xml.dist files