update to `oracle` 0.6 #25

Job	Run time
static-code-checks	1m 38s
build (ubuntu-latest, 1.60.0)	1m 6s
build (ubuntu-latest, 1.60.0, --all-features)	1m 9s
build (ubuntu-latest, stable)	16s
build (ubuntu-latest, stable, --all-features)	40s
build (macos-latest, 1.60.0)	2m 16s
build (macos-latest, 1.60.0, --all-features)	2m 1s
build (macos-latest, stable)	28s
build (macos-latest, stable, --all-features)	34s
build (windows-latest, 1.60.0)	1m 52s
build (windows-latest, 1.60.0, --all-features)	1m 58s
build (windows-latest, stable)	2m 1s
build (windows-latest, stable, --all-features)	1m 37s
	17m 36s

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