Added support for Ruby v2 Specialization (#1101)

* Added support for Ruby v2 Specialization
* Added ruby v2 example with builder code

examples/ruby/parse/parse.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require 'nokogiri'
+
+def handler(context)
+  context.logger.info("Received request")
+
+  doc = Nokogiri::XML(context.request.body.read)
+  ele = doc.at_xpath('//message')
+  msg = ele.nil? ? 'No Message' : ele.content
+
+   Rack::Response.new([msg, "\n"]).finish
+end