v8.0.0-BETA1

Changelog (v7.3.4...v8.0.0-BETA1)

• feature symfony/symfony#61424 [HttpKernel][Mime][Serializer][String][Validator] Replace __sleep/wakeup() by __(un)serialize() (@nicolas-grekas)
• feature symfony/symfony#61423 [Mime] Deprecate implementing __sleep/wakeup() on AbstractPart implementations (@nicolas-grekas)
• feature symfony/symfony#61418 [Validator] Deprecate implementing __sleep/wakeup() on GenericMetadata implementations (@nicolas-grekas)
• feature symfony/symfony#61417 [String] Deprecate implementing __sleep/wakeup() on string implementations (@nicolas-grekas)
• feature symfony/symfony#60639 Bump Symfony 8 to PHP >= 8.4 (@nicolas-grekas)