* Deprecate defining custom constraints not supporting named arguments

* Deprecate passing an array of options to the constructors of the constraint classes, pass each option as a dedicated argument instead

* Add support for ratio checks for SVG files to the `Image` constraint

* Add support for the `otherwise` option in the `When` constraint

* Add support for multiple fields containing nested constraints in `Composite` constraints

* Add the `stopOnFirstError` option to the `Unique` constraint to validate all elements