bump dependency of `cipher` to `0.5.0-pre.4` #141

Job	Run time
build (1.72.0, thumbv7em-none-eabi)	18s
build (1.72.0, wasm32-unknown-unknown)	16s
build (stable, thumbv7em-none-eabi)	13s
build (stable, wasm32-unknown-unknown)	8s
test (1.72.0)	20s
test (stable)	14s
minimal-versions / minimal-versions	21s
	1m 50s

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