ci: Test Emacs 30.1 #63

Job	Run time
test (ubuntu-latest, 27.2, false)	39s
test (ubuntu-latest, 28.2, false)	40s
test (ubuntu-latest, 29.4, false)	3m 53s
test (ubuntu-latest, 30.1, false)	4m 9s
test (macos-latest, 28.2, false)	1m 52s
test (macos-latest, 29.4, false)	3m 53s
test (macos-latest, 30.1, false)	4m 14s
test (windows-latest, 27.2, false)	3m 9s
test (windows-latest, 28.2, false)	2m 16s
test (windows-latest, 29.4, false)	9m 27s
test (windows-latest, 30.1, false)	3m 7s
test (ubuntu-latest, snapshot, true)	37s
test (macos-latest, snapshot, true)	1m 54s
test (windows-latest, snapshot, true)	10m 14s
	50m 4s

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