Release prep v3.1.0 #493

Job	Run time
spec (ruby 2.7) / spec	58s
spec (ruby 3.2) / spec	1m 20s
acceptance (ruby 3.2 \| ubuntu-latest) / acceptance	11m 48s
acceptance (ruby 2.7 \| ubuntu-latest) / acceptance	12m 41s
acceptance (ruby 2.7 \| windows-2019) / acceptance	28m 55s
acceptance (ruby 3.2 \| windows-2019) / acceptance	33m 44s
	1h 29m 26s

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