[meta] Requirements for tagging Drupal 11.0.0-beta1

Must-haves prior to tagging 11.0.0-beta1

Release notes: #3425287: 11.0.0-beta1 release notes

1. Fully support PHP versions above the Drupal 11 minimum.
2. Update or decouple/remove PHP (Composer) dependencies.
   • Symfony:
     • ✅ Update to Symfony 7: #3394694: [Meta] Symfony 7 compatibility
     • Support and recommend Symfony 7.1: #3447191: Support and recommend Symfony 7.1.0-BETA1 for Drupal 11.0.0-beta1
   • PHPUnit:
     • PHPUnit 10 compatibility: #3217904: [meta] Support PHPUnit 10 in Drupal 11
     • #3444792: Prepare for PHPUnit 10
   • Doctrine
     • #3396165: [meta] Convert all core plugin types to attribute discovery
   • Re-evaluate other backend dependencies in the year prior to the release.
3. Update or decouple/remove frontend dependencies.
   • jQuery
   • ✅ jQuery 4: #3411839: [11.x] Update to jQuery 4.0.x beta + #3296098: Removal :tabbable usage in dialog.js
   • ✅ Yarn:#3109556: Update from Yarn 1 to Yarn 4
   • ✅ Modernizr:#3239980: Deprecate Modernizr
4. Remove all deprecated code, libraries, and BC layers.
   • ✅ Extensions:#3309322: [11.x] [Meta] Remove deprecated extensions from Drupal 11
   • #3301206: [meta] Fix incomplete/incorrect deprecations in Drupal core
   • #3423886: [META] Remove deprecated classes, methods, procedural functions and code paths outside of deprecated modules on the Drupal 11 branch
5. ✅ Update deprecation message in DeprecatedServicePropertyTrait: #3318342: DeprecatedServicePropertyTrait should point to 11.0
6. Resolve critical 10.x -> 10.x upgrade path bugs.
7. #3416928: [Meta] Remove updates added up until 10.3.0 from Drupal 11 Remove old upgrade paths up to 10.x.0 and add new database dumps.
8. Resolve any significant outstanding bugs for new platform requirements (PHP, Composer, etc.)
9. Resolve any 11.0.x-only security or data integrity issues.
10. Resolve other D11-only upgrade blockers.
11. Update all dependencies (backend and frontend) to their latest versions immediately before tagging 11.0.0-beta1.
    • #3439591: Add composer dependency on ext-zlib
    • #3439525: Update composer dependencies for Drupal 11.0
    • #3441331: Update to Twig 3.9
    • #3441700: Update phpdocumentor/reflection-docblock for Drupal 11
12. Update COPYRIGHT.txt #3413657: Update COPYRIGHT.txt for 2024

Should-haves prior to tagging 11.0.0-beta1

These become beta targets if they are not completed by the deadline, and may contribute to other adjustments to the schedule (TBD).

1. Fix DB fixtures process:
   • #3213633: Improve DX of maintaining migration database fixtures: provide an option for creating per-table database fixtures in DbDumpcommand
   • #3082230: [meta] Convert some tests to Build tests
2. jQuery UI
   • #2158943: Add a native dialog element to deprecate the jQuery UI dialog
   • #3076171: Provide a new library to replace jQuery UI autocomplete
   • jQuery Form: Remove. #3189416: Remove jQuery Form dependency from misc/ajax.js
3. Ensure that 10.x.x-beta1 ships with logic for warnings about future security coverage EOLs (both for the LTS version of Drupal itself, and for PHP versions, with dates hard coded as needed).
   • #3361728: Make 10.x EOL warning better than the 9.5.x one
4. Backbone:#3145958: [META] Re-evaluate use of Backbone.js in core (marked internal in Drupal 10)
5. Disruptive issues:
   • #3421418: [May 2024] Add void return typehints to all test methods
6. Other issues TBD.