Validate whether orjson casting still is necessary with more recent orjson versions

[jonasvdd]

https://github.com/predict-idlab/plotly-resampler/blob/5df40fd0575db62bd06d20c129d8643d75dba558/plotly_resampler/figure_resampler/figure_resampler_interface.py#L703-L705

Maybe also make a test which validates this? (expected behavior -> casting is needed)

[jonasvdd]

woah, my spider senses are on par! 💪🏼