Restore automatic spec updates #352

Job	Run time
CI (macos-13, 3.5)	15s
Integration (macos-13, 3.5)	14s
CI (macos-13, 3.6)	41s
Integration (macos-13, 3.6)	1m 1s
CI (macos-13, 3.7)	41s
Integration (macos-13, 3.7)	1m 7s
CI (macos-13, 3.8)	27s
Integration (macos-13, 3.8)	46s
CI (macos-13, pypy-3.7)	55s
Docs	1m 58s
Integration (macos-13, pypy-3.7)	1m 8s
CI (windows-latest, 3.5)	1m 8s
Integration (windows-latest, 3.5)	1m 12s
CI (windows-latest, 3.7)	1m 29s
Integration (windows-latest, 3.7)	1m 36s
CI (windows-latest, 3.8)	1m 28s
Integration (windows-latest, 3.8)	1m 48s
CI (windows-latest, pypy-3.7)	2m 7s
Integration (windows-latest, pypy-3.7)	2m 5s
Integration (ubuntu-20.04, 3.7)	33s
CI (ubuntu-20.04, 3.7)	24s
Integration (ubuntu-20.04, 2.7)	39s
CI (ubuntu-20.04, 2.7)	23s
	24m 5s

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