Bump `cipher` to `0.5.0-pre.4` #843

Job	Run time
build (1.72.0, armv7a-none-eabi)	16s
build (1.72.0, thumbv7em-none-eabi)	18s
build (1.72.0, wasm32-unknown-unknown)	15s
build (stable, armv7a-none-eabi)	8s
build (stable, thumbv7em-none-eabi)	11s
build (stable, wasm32-unknown-unknown)	10s
test (1.72.0)	24s
test (stable)	24s
	2m 6s

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