Cloning behavior inconsistent with the extension

[mnavarrocarter]

Hi there!

I'm implementing a middleware pipeline third-party library using this extension with the polyfill. The implementation exhausts the Queue class of this library recursively by cloning itself. You can take a look at the implementation here.

When I run the tests with the extension, everything works perfectly well and as expected. However, when I run the tests with the polyfill, everything breaks.

Looking at the polyfill code, I realized that there was not a Ds\Queue::__clone method implemented, so when I called clone on the queue, the internal Ds\Deque containing the array was not being cloned.

I implemented the clone method in my vendor folder just for testing purposes, and this fixed it.

I can submit a PR with the fix if you are busy to fix it yourself. Just let me know.

Thanks for this awesome extension!

[rtheunissen]

Thanks for this bug report, I'll make some time to fix this asap. 👍

[mnavarrocarter]

Thanks a lot! Switched to Deque in the meantime so no hurry! :)