3e05010d

Support min/max-length bounds for strings.

Not sure if this change is a good idea, but I was looking for a way to support minLength/maxLength for JSON specs.
https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-validation-01#name-validation-keywords-for-str

So I tried to follow the standard already established by integer bounds and implemented the similar thing for strings.