Bump version to v4.1.3 (#25757)

lib/sanitize_ext/sanitize_config.rb

@@ -109,26 +109,26 @@ class Sanitize
       ]
     )
 
-    MASTODON_OEMBED ||= freeze_config merge(
-      RELAXED,
-      elements: RELAXED[:elements] + %w(audio embed iframe source video),
+    MASTODON_OEMBED ||= freeze_config(
+      elements: %w(audio embed iframe source video),
 
-      attributes: merge(
-        RELAXED[:attributes],
+      attributes: {
         'audio' => %w(controls),
         'embed' => %w(height src type width),
         'iframe' => %w(allowfullscreen frameborder height scrolling src width),
         'source' => %w(src type),
         'video' => %w(controls height loop width),
-        'div' => [:data]
-      ),
+      },
 
-      protocols: merge(
-        RELAXED[:protocols],
+      protocols: {
         'embed' => { 'src' => HTTP_PROTOCOLS },
         'iframe' => { 'src' => HTTP_PROTOCOLS },
-        'source' => { 'src' => HTTP_PROTOCOLS }
-      )
+        'source' => { 'src' => HTTP_PROTOCOLS },
+      },
+
+      add_attributes: {
+        'iframe' => { 'sandbox' => 'allow-scripts allow-same-origin allow-popups allow-popups-to-escape-sandbox allow-forms' },
+      }
     )
   end
 end