CI

Bump to rb-sys to v0.9.93 #91

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Run time

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Job	Run time
ci-data	8s
ci (ubuntu-latest, 3.1)	3m 13s
ci (ubuntu-latest, 3.2)	3m 13s
ci (ubuntu-latest, 3.3)	3m 14s
ci (macos-latest, 3.1)	1s
ci (macos-latest, 3.2)	1s
ci (macos-latest, 3.3)	1s
ci (windows-latest, 3.1)	3m 2s
ci (windows-latest, 3.2)	2m 55s
ci (windows-latest, 3.3)	2m 48s
ci (windows-latest, mswin)	2m 32s
	21m 8s