Security:

• Fixes XSS vuln in event metadata (https://patchstack.com/database/report-preview/8edeb59a-59e6-42aa-8ed4-5f79cdedf820)

Features:

• Adds "Completed" event status

Misc:

• Refactor source of blocks with wordpress-scripts
• Improves WordPress's PHPCS compliance
• Fix deprecated gmt_offset
• Mark legacy widgets as deprecated
• Fix warnings in PHP8+