Add deprecated DocComment tag for getAttribs

Author: wandersonwhcr

src/Helper/Gravatar.php

@@ -234,6 +234,8 @@ public function getAttributes()
      * value!
      *
      * @return array
+     *
+     * @deprecated Please use Zend\View\Helper\Gravatar::getAttributes
      */
     public function getAttribs()
     {

test/Helper/GravatarTest.php

@@ -309,4 +309,12 @@ public function testGetAttribsIsDeprecated()
 
         $this->helper->getAttribs();
     }
+
+    public function testGetAttribsDocCommentHasDeprecated()
+    {
+        $method  = new ReflectionMethod($this->helper, 'getAttribs');
+        $comment = $method->getDocComment();
+
+        $this->assertContains('@deprecated', $comment);
+    }
 }