8.2
Fix return types
[Notifier] Add tests for option classes
Add PR template and auto-close PR on subtree split repositories
added missing gitattributes and gitignore
[Notifier] [Firebase] Add data field to options
Use CPP where possible
CS fixes
Update license years (last time)
Add call to backers in README files
Bump to php >= 8.4.1
Update XSD references in phpunit.xml.dist files