Description

Some things have been deprecated in Symfony 4 and removed in Symfony 5. The new way of doing each thing is implemented in Symfony 4.4, so we can move to that, and then there will be no code to change again when moving up to Symfony 5. This is what I have found so far:

1. Symfony\Component\EventDispatcher\Event is now Symfony\Contracts\EventDispatcher\Event

2. stopPropagation() returns void. Classes that extend that need to have the return type declared.

3. Symfony\Component\Translation\PluralizationRules is gone in Symfony 5. Symfony\Contracts\Translation\TranslatorTrait has the pluralization rules in function getPluralizationRule

Implement these changes now.

Related Issue

#39630

How Has This Been Tested?

CI

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE