Fixed, that Item#respond_to? conform to Ruby API
Fixed, that Item#respond_to? conform to Ruby API

Ruby's native Object#respond_to? accepts a second boolean parameter
to determine if private methods should be included.

This commit closes #532.

mavenlink/retire,karmi/retire,zaharpecherin/retire,doximity/tire,Telmate/tire,fabn/retire,tklee/tire_shiphawk,ChapterMedia/tire,elbuo8/retire,brijeshgpt7/retire,1776/tire,dbose/retire,iamrahulroy/retire,alphagov/tire,HenleyChiu/tire,rubydubee/retire