Add strict type checking

[millnut]

Drupal is moving towards strict type (https://www.drupal.org/project/drupal/issues/3404246, https://www.drupal.org/project/drupal/issues/3295295).

I have started adding improvements to PHPStan checks to run strict type checking, as part of this it includes a new dev package in the project called phpstan/phpstan-strict-rules. By default I've disabled most of the rules it provides apart from checking calls are strict.

The checks can be found in this PR localgovdrupal/localgov_project#153 where the previous deprecated check is now a static analysis check to report all modules for deprecations, strict calls and typing.

Overall there are only 129 strict type/call issues which is great as this means minimal work to update.

This ticket would be best used to track updating each module.

• localgov_alert_banner
• localgov_core
• localgov_demo
• localgov_directories
• localgov_events
• localgov_geo
• localgov_guides
• localgov_menu_link_group
• localgov_news
• localgov_openreferral
• localgov_page_components
• localgov_paragraphs
• localgov_search
• localgov_search_solr
• localgov_services
• localgov_step_by_step
• localgov_subsites
• localgov_workflows
• localgov (profile)