Test

Merge pull request #5633 from LukeTheoJohnson/fix-json-io-utf8-encoding #213

Job	Run time
Optional tests (Kaleido only), Kaleido v0 (Python 3.12, kaleido 0.2.1)	33s
Optional tests (Python 3.11, pandas 2)	3m 7s
Optional tests (Python 3.9, pandas 1)	3m 42s
Optional tests (Python 3.11)	2m 58s
Optional tests (Python 3.13)	3m 21s
Optional tests (Python 3.10)	3m 40s
Optional tests (Python 3.9)	4m 3s
Core tests (Python 3.11)	20s
Optional tests (Python 3.8)	3m 33s
Core tests (Python 3.8)	29s
Core tests (Python 3.10)	20s
Core tests (Python 3.12)	21s
Optional tests (Python 3.12)	3m 8s
Core tests (Python 3.13)	26s
Core tests (Python 3.9)	26s
	30m 27s

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