BigInteger serialization fixed

src/main/java/com/corundumstudio/socketio/parser/JacksonJsonSupport.java

@@ -39,6 +39,7 @@ import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.fasterxml.jackson.databind.node.ObjectNode;
@@ -201,6 +202,7 @@ public class JacksonJsonSupport implements JsonSupport {
 
         objectMapper.setSerializationInclusion(Include.NON_NULL);
         objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        objectMapper.configure(SerializationFeature.WRITE_BIGDECIMAL_AS_PLAIN, true);
 
 //        TODO If jsonObjectDeserializer will be not enough
 //        TypeResolverBuilder<?> typer = new DefaultTypeResolverBuilder(DefaultTyping.NON_FINAL);