bcrypt-pbkdf: scrypt: bump cipher to `0.5.0-pre.4` (#489) #868

Job	Run time
build (1.71.0, thumbv7em-none-eabi)	24s
build (1.71.0, wasm32-unknown-unknown)	25s
build (stable, thumbv7em-none-eabi)	14s
build (stable, wasm32-unknown-unknown)	20s
cross (powerpc-unknown-linux-gnu, 1.71.0)	1m 47s
cross (powerpc-unknown-linux-gnu, stable)	1m 34s
test (i686-unknown-linux-gnu, 1.71.0, sudo apt update && sudo apt install gcc-multilib)	49s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	41s
test (x86_64-unknown-linux-gnu, 1.71.0)	27s
test (x86_64-unknown-linux-gnu, stable)	21s
minimal-versions / minimal-versions	1m 11s
	8m 13s

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