added yandex:related support

lib/index.js

@@ -43,6 +43,22 @@ function generateXML(data) {
         let fullContent = '<header>' + img + ' <h1>' + item.title + '</h1>' + menu + '</header>' + item.content;
 
         item_values.push({'turbo:content': {_cdata: fullContent}});
+        
+                let relatedLink = function(related) {
+            return (
+                '<link url="' +
+                related.url +
+                '" img="' +
+                related.image +
+                '">' +
+                related.text +
+                '</link>'
+            );
+        };
+        ifTruePush(item.related, item_values, {
+            'yandex:related': item.related.map(relatedLink).join('')
+        });
+
         channel.push({item: item_values});
 
     });
@@ -80,7 +96,8 @@ function YTurbo(options, items) {
             author: options.author,
             date: options.date || options.pubDate,
             content: options.content,
-            menu: options.menu
+            menu: options.menu,
+            related: options.related
         };
 
         this.items.push(item);