Bump symfony/translation from 5.4.19 to 5.4.21

[dependabot]

Bumps symfony/translation from 5.4.19 to 5.4.21.

Release notes

Sourced from symfony/translation's releases.

v5.4.21

Changelog (symfony/translation@v5.4.20...v5.4.21)

• bug #49368 Make data providers for abstract test cases static (OskarStark, alexandre-daubois)

Changelog

Sourced from symfony/translation's changelog.

5.4.21

• [BC BREAK] The following data providers for ProviderFactoryTestCase are now static: supportsProvider(), createProvider(), unsupportedSchemeProvider()and incompleteDsnProvider()
• [BC BREAK] ProviderTestCase::toStringProvider() is now static

5.4

• Add github format & autodetection to render errors as annotations when running the XLIFF linter command in a Github Actions environment.
• Translation providers are not experimental anymore

5.3

• Add translation:pull and translation:push commands to manage translations with third-party providers
• Add TranslatorBagInterface::getCatalogues method
• Add support to load XLIFF string in XliffFileLoader

5.2.0

• added support for calling trans with ICU formatted messages
• added PseudoLocalizationTranslator
• added TranslatableMessage objects that represent a message that can be translated
• added the t() function to easily create TranslatableMessage objects
• Added support for extracting messages from TranslatableMessage objects

5.1.0

• added support for name attribute on unit element from xliff2 to be used as a translation key instead of always the source element

5.0.0

• removed support for using null as the locale in Translator
• removed TranslatorInterface
• removed MessageSelector
• removed ChoiceMessageFormatterInterface
• removed PluralizationRule
• removed Interval
• removed transChoice() methods, use the trans() method instead with a %count% parameter
• removed FileDumper::setBackup() and TranslationWriter::disableBackup()
• removed MessageFormatter::choiceFormat()
• added argument $filename to PhpExtractor::parseTokens()
• removed support for implicit STDIN usage in the lint:xliff command, use lint:xliff - (append a dash) instead to make it explicit.

... (truncated)

Commits

• 6996aff Fix phpdocs in components
• 7bcbf29 [Translation] Fix merge
• 1e9094f minor #49431 [Mailer][Translation] Remove some static occurrences that may ...
• 7ede00d [Translation][Mailer] Convert $this calls to static ones in data providers
• 114853f [BC Break] Make data providers for abstract test cases static
• 49f9035 CS fix
• 3f58d91 Fix PHPDoc (wrong order)
• 6f86de5 Migrate to static data providers using rector/rector
• 3658df7 minor #49253 [PHPUnit 10] Use TestCase suffix for abstract tests in `/Tests...
• 062cc4e [Tests] Migrate data providers to static ones
• Additional commits viewable in compare view

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