Fix. Now construct the right instance

Author: guy120494

src/main/java/graphql/annotations/processor/typeBuilders/UnionBuilder.java

@@ -89,7 +89,14 @@ private TypeResolver getTypeResolver(ProcessingElementsContainer container, Grap
                 .findFirst();
 
         return typeResolverConstructorOptional
-                .map(constructor -> (TypeResolver) constructNewInstance(constructor, unionAnnotation.possibleTypes(), container))
+                .map(constructor -> {
+                    if(constructor.getParameterCount() == 0) {
+                        return (TypeResolver) constructNewInstance(constructor);
+                    }
+                    else {
+                        return (TypeResolver) constructNewInstance(constructor, unionAnnotation.possibleTypes(), container);
+                    }
+                })
                 .orElseGet(() -> new UnionTypeResolver(unionAnnotation.possibleTypes(), container));
     }