test

maint: convert to cached_property and other minor refactors #2964

Job	Run time
Python 3.8 on Linux	10s
Python 3.9 on Linux	10s
Python 3.10 on Linux	9s
Python 3.11 on Linux	11s
Downstream builds with Python 3.8	37s
Downstream builds with Python 3.9	40s
Downstream builds with Python 3.10	36s
Python 3.12 on Linux	7s
Downstream builds with Python 3.11	34s
Python 3.13 on Linux	17s
Downstream builds with Python 3.12	40s
Python 3.8 on Windows	28s
Downstream builds with Python 3.13	45s
Python 3.9 on Windows	26s
Python 3.10 on Windows	31s
Python 3.11 on Windows	29s
Python 3.12 on Windows	20s
Python 3.13 on Windows	58s
Python 3.8 on macOS	45s
Python 3.9 on macOS	27s
Python 3.10 on macOS	29s
Python 3.11 on macOS	1m 45s
Python 3.12 on macOS	11s
Python 3.13 on macOS	11s
Report coverage	0s
check	3s
	11m 59s

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