Add missing rename method in playground

Author: adoy

playground.php

@@ -30,6 +30,15 @@ public function testRenameClassVariable($renameMe)
         $renameMe = 'I\'m not renamed';
     }
 
+    /**
+     * Place your cursor on a method name and press <Leader>rm
+     * to rename a method
+     */
+    public function testRenameMethod()
+    {
+        $this->testRenameMethod();
+    }
+
     /**
      * Place your cursor on a Fully qualified class name and press <Leader>eu
      * to create an alias and place the new Use statement on top of the file