Bump conda-incubator/setup-miniconda from 2 to 3 #74

Job	Run time
lint and style checks	22s
test (windows-latest, 3.8, false, false)	4m 6s
test (windows-latest, 3.9, false, false)	3m 25s
test (windows-latest, 3.10, false, false)	4m 17s
test (ubuntu-latest, 3.8, false, false)	1m 25s
test (ubuntu-latest, 3.9, false, false)	1m 23s
test (ubuntu-latest, 3.10, false, false)	1m 23s
test (macos-latest, 3.8, false, false)	2m 51s
test (macos-latest, 3.9, false, false)	4m 16s
test (macos-latest, 3.10, false, false)	2m 26s
test (3.11, ubuntu-latest, true, false)	3m 5s
test (3.10, ubuntu-latest, false, true)	1m 0s
coveralls	11s
	30m 10s

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