More PHP 7.4 deprecations

[dvdcastro]

Hello,

We are reviewing the use of PHP 7.4.

When is it expected for this plugin to work with PHP 7.4?

Deprecated: Array and string offset access syntax with curly braces is deprecated in /vagrant/www/moodle/question/type/wq/quizzes/lib/php/Boot.class.php on line 221

Call Stack:
    0.0003     409008   1. {main}() /vagrant/www/moodle/admin/tool/phpunit/cli/util.php:0
    2.1006   20483808   2. phpunit_util::install_site() /vagrant/www/moodle/admin/tool/phpunit/cli/util.php:151
    2.1028   20484240   3. install_cli_database() /vagrant/www/moodle/lib/phpunit/classes/util.php:466
  633.8123  101067608   4. admin_apply_default_settings() /vagrant/www/moodle/lib/installlib.php:512
  633.8392  101067512   5. admin_get_root() /vagrant/www/moodle/lib/adminlib.php:8734
  638.4309  105865152   6. require('/vagrant/www/moodle/admin/settings/plugins.php') /vagrant/www/moodle/lib/adminlib.php:8708
  648.0949  142559936   7. core\plugininfo\block->load_settings() /vagrant/www/moodle/admin/settings/plugins.php:81
  648.0972  142564312   8. include('/vagrant/www/moodle/blocks/sharing_cart/settings.php') /vagrant/www/moodle/lib/classes/plugininfo/block.php:99
  648.2034  142625088   9. admin_setting_configmulticheckboxqtypes->__construct() /vagrant/www/moodle/blocks/sharing_cart/settings.php:43
  648.2034  142625088  10. question_bank::get_all_qtypes() /vagrant/www/moodle/blocks/sharing_cart/lib/settingslib.php:162
  648.2419  143881392  11. question_bank::get_qtype() /vagrant/www/moodle/question/engine/bank.php:154
  648.2432  143905336  12. include_once('/vagrant/www/moodle/question/type/essaywiris/questiontype.php') /vagrant/www/moodle/question/engine/bank.php:100
  648.2446  143952824  13. require_once('/vagrant/www/moodle/question/type/wq/questiontype.php') /vagrant/www/moodle/question/type/essaywiris/questiontype.php:19
  648.2456  143953960  14. require_once('/vagrant/www/moodle/question/type/wq/config.php') /vagrant/www/moodle/question/type/wq/questiontype.php:19
  648.2470  143957600  15. require_once('/vagrant/www/moodle/question/type/wq/quizzes/quizzes.php') /vagrant/www/moodle/question/type/wq/config.php:19
  648.2495  143978912  16. com_wiris_system_CallWrapper->init() /vagrant/www/moodle/question/type/wq/quizzes/quizzes.php:9