Bump `cipher` to `0.5.0-pre.4` #744

Job	Run time
build (1.71.0, thumbv7em-none-eabi)	16s
build (1.71.0, wasm32-unknown-unknown)	17s
test (1.72.0)	25s
test (stable)	26s
build (stable, thumbv7em-none-eabi)	11s
build (stable, wasm32-unknown-unknown)	22s
	1m 57s

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