bump `cipher` dependency to `0.5.0-pre.4` #1011

Job	Run time
aesni (i686-unknown-linux-gnu, 1.72.0, sudo apt update && sudo apt install gcc-multilib)	34s
armv8 (aarch64-unknown-linux-gnu, 1.72.0)	56s
aesni (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	40s
aesni (x86_64-unknown-linux-gnu, 1.72.0)	23s
autodetect (i686-unknown-linux-gnu, 1.72.0, sudo apt update && sudo apt install gcc-multilib)	39s
build (1.72.0, thumbv7em-none-eabi)	28s
aesni (x86_64-unknown-linux-gnu, stable)	36s
autodetect (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	28s
clippy	18s
build (1.72.0, wasm32-unknown-unknown)	33s
autodetect (x86_64-unknown-linux-gnu, 1.72.0)	20s
build (stable, thumbv7em-none-eabi)	21s
autodetect (x86_64-unknown-linux-gnu, stable)	13s
cross (aarch64-unknown-linux-gnu, 1.72.0)	1m 8s
build (stable, wasm32-unknown-unknown)	30s
cross (aarch64-unknown-linux-gnu, stable)	59s
soft (i686-unknown-linux-gnu, 1.72.0, sudo apt update && sudo apt install gcc-multilib)	44s
soft (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	44s
cross (powerpc-unknown-linux-gnu, 1.72.0)	1m 12s
soft (x86_64-unknown-linux-gnu, 1.72.0)	20s
cross (powerpc-unknown-linux-gnu, stable)	1m 13s
soft (x86_64-unknown-linux-gnu, stable)	19s
minimal-versions / minimal-versions	22s
	14m 0s

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