Validation support minLength, maxLength, minimum and maximum

Hello,

I would like use spring-data-rest with react json form schema.

So, I would like use HTML 5 in validations supporterd fields by min, max and size.

Then, I recomend change JsonSchemaProperty to add new fields used in validation.

The resuled expected is:

{
  "title": "Menu",
  "properties": {
    "route": {
      "title": "Route",
      "readOnly": false,
      "type": "string",
      "minLength": 5,
      "maxLength": 60
    },
 "denner": {
      "title": "Denner",
      "readOnly": false,
      "type": "integer",
      "minimum": 5,
      "maximum": 10
    }
}

Start with JsonSchemaProperty and trace how the REST JSON schema is produced. Check the referenced React JSON Schema Form examples to confirm the expected minLength, maxLength, minimum, and maximum output, then verify the generated schema matches the examples.