Test

➖ Drop support for Python 3.9 #3394

Job	Run time
test (ubuntu-latest, 3.13, highest)	31s
test (macos-latest, 3.13, highest)	44s
test (macos-latest, 3.11, highest)	39s
test (windows-latest, 3.12, lowest-direct)	1m 53s
test (ubuntu-latest, 3.10, lowest-direct)	30s
test (windows-latest, 3.14, highest)	49s
test (macos-latest, 3.14, highest)	44s
test (ubuntu-latest, 3.14, highest)	27s
coverage-combine	25s
alls-green	4s
	6m 46s

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