build

Update rubocop requirement from ~> 1.56.0 to ~> 1.57.0 #1809

Job	Run time
lint	16s
spec (alpine-latest, 3.0)	38s
spec (macos-latest, 3.0)	33s
spec (alpine-latest, 3.1)	38s
spec (alpine-latest, 3.2)	38s
spec (macos-latest, 3.1)	29s
spec (alpine-latest, 3.3-rc)	56s
spec (macos-latest, 3.2)	43s
spec (macos-latest, 3.3)	1m 8s
spec (macos-latest, jruby)	3m 40s
spec (macos-latest, truffleruby)	3m 36s
spec (macos-latest, truffleruby+graalvm)	12m 45s
spec (ubuntu-latest, 3.0)	27s
spec (ubuntu-latest, 3.1)	25s
spec (ubuntu-latest, 3.2)	20s
spec (ubuntu-latest, 3.3)	40s
spec (ubuntu-latest, jruby)	2m 19s
spec (ubuntu-latest, truffleruby)	1m 54s
spec (ubuntu-latest, truffleruby+graalvm)	8m 15s
spec (windows-latest, 3.0)	1m 48s
spec (windows-latest, 3.1)	2m 8s
spec (windows-latest, 3.2)	2m 15s
spec (windows-latest, jruby)	3m 21s
release	0s
	49m 52s

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