Marks Zend\Writer\Writer::lcfirst method as deprecated

src/Writer/Writer.php

@@ -205,6 +205,12 @@ public static function registerCoreExtensions()
             );
     }
 
+    /**
+     * @deprecated This method is deprecated and will be removed with version 3.0
+     *             Use PHP's lcfirst function instead. @see https://php.net/manual/function.lcfirst.php
+     * @param string $str
+     * @return string
+     */
     public static function lcfirst($str)
     {
         $str[0] = strtolower($str[0]);