Bump `cipher` to v0.5.0-pre.7 #58

Job	Run time
minimal-versions	0s
test (1.71.0)	16s
build (1.71.0, thumbv7em-none-eabi)	15s
test (stable)	12s
build (1.71.0, wasm32-unknown-unknown)	16s
build (stable, thumbv7em-none-eabi)	9s
build (stable, wasm32-unknown-unknown)	29s
	1m 37s

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