Fixed optional move constructor for references.

source/mijin/container/optional.hpp

@@ -173,7 +173,12 @@ Optional<TValue>::Optional(Optional&& other) noexcept
 {
     if (other)
     {
+        if constexpr (!std::is_reference_v<TValue>) {
             emplace(std::move(other.get()));
+        }
+        else {
+            emplace(other.get());
+        }
         other.reset();
     }
 }