Fix error not passing RestClient http error body

lib/pkparse/response_error.rb

@@ -11,7 +11,7 @@ module PKParse
 
       def parse_body
         body = original_exception.http_body
-        parsed_body = JSON.parse(body, symbolize_keys: true)
+        parsed_body = JSON.parse(body, symbolize_names: true)
         @message = parsed_body[:error]
       rescue StandardError => e
         PKParse.logger.error("Exception parsing ResponseError http body:\n#{e}\n#{e.backtrace.join("\n")}")