registry: iterator_concept

src/entt/entity/registry.hpp

@@ -50,6 +50,7 @@ public:
     using reference = value_type;
     using difference_type = std::ptrdiff_t;
     using iterator_category = std::input_iterator_tag;
+    using iterator_concept = std::random_access_iterator_tag;
 
     constexpr registry_storage_iterator() noexcept
         : it{} {}