Document lazy objects (#3975)

Author: arnaud-lb

language/oop5.xml

@@ -47,6 +47,7 @@
   &language.oop5.references;
   &language.oop5.serialization;
   &language.oop5.variance;
+  &language.oop5.lazy-objects;
   &language.oop5.changelog;
 </chapter>
 

language/oop5/changelog.xml

@@ -16,6 +16,12 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.4.0</entry>
+      <entry>
+       Added: Support for <link linkend="language.oop5.lazy-objects">Lazy Objects</link>.
+      </entry>
+     </row>
      <row>
       <entry>8.1.0</entry>
       <entry>