v7.3.0-BETA1

Changelog (v7.2.6...v7.3.0-BETA1)

• feature symfony/symfony#58485 [Validator] Add filenameCharset and filenameCountUnit options to File constraint (@IssamRaouf)
• feature symfony/symfony#59800 [Validator] Add support for closures in When (@alexandre-daubois)
• feature symfony/symfony#59274 [Validator] Allow Unique constraint validation on all elements (@Jean-Beru)
• feature symfony/symfony#50797 [FrameworkBundle][Validator] Add framework.validation.disable_translation option (@alexandre-daubois)
• feature symfony/symfony#59634 [Validator] Add support for the otherwise option in the When constraint (@alexandre-daubois)
• feature symfony/symfony#54744 [Validator] deprecate the use of option arrays to configure validation constraints (@xabbuh)
• feature symfony/symfony#58542 [Validator] Add Slug constraint (@raffaelecarelle)
• feature symfony/symfony#58559 [Validator] [DateTime] Add format to error messages (@sauliusnord)
• feature symfony/symfony#59265 [Validator] Validate SVG ratio in Image validator (@maximecolin)