test

refactor: drop SpinnerStyleComposer interface #442

Job	Run time
test (stable, macos-latest)	34s
test (oldstable, ubuntu-latest)	20s
test (stable, ubuntu-latest)	29s
test (oldstable, macos-latest)	26s
test (oldstable, windows-latest)	46s
test (stable, windows-latest)	1m 0s
	3m 35s

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