Federate likes.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -72,6 +72,10 @@ def like(%User{ap_id: ap_id} = user, %Object{data: %{ "id" => id}} = object) do
 
         update_object_in_activities(object)
 
+        if user.local do
+          Pleroma.Web.Federator.enqueue(:publish, activity)
+        end
+
         {:ok, activity, object}
     end
   end