Improve Constructor Detection

[SentryMan]

it seems for classes like this:

@Json
public class MultiConstruct {

  final List<String> body;

  public MultiConstruct(String string) {
    this(List.of(string));
  }

  public MultiConstruct(List<String> body) {
    this.body = body;
  }

  public MultiConstruct(List<String> body, int somethin) {
    this.body = body;
  }
}

the wrong constructor is being picked up, causing problems.