SvelteKit SuperForms (javascript)

Fixed

• FormPath et al. now extends only basic objects and arrays, avoiding issues with classes, all built-in objects like File and Date, and special "branded" types that validation libraries are using. Thanks to Matt DeKok for this fix!
• SuperDebug always renders left-to-right now.
• Discriminated unions for the form itself weren't including the union keys for the schema, when parsing the form data.
• devalue updated to ^5.0.0 to handle invalid dates.