CI

Bump to rb-sys to v0.9.94 #92

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Run time

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Job	Run time
ci-data	3s
ci (ubuntu-latest, 3.1)	3m 17s
ci (ubuntu-latest, 3.2)	3m 18s
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 19s
ci (windows-latest, 3.2)	3m 24s
ci (windows-latest, 3.3)	3m 24s
ci (windows-latest, mswin)	3m 25s
	23m 27s