Test

➖ Drop support for Python 3.9 #3393

Job	Run time
test (ubuntu-latest, 3.10, lowest-direct)	26s
test (ubuntu-latest, 3.13, highest)	33s
test (windows-latest, 3.12, lowest-direct)	1m 28s
test (macos-latest, 3.11, highest)	22s
test (macos-latest, 3.14, highest)	29s
test (macos-latest, 3.13, highest)	27s
test (ubuntu-latest, 3.14, highest)	24s
test (windows-latest, 3.14, highest)	46s
alls-green	2s
coverage-combine	0s
	4m 57s

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