speck

bump `cipher` dependency to `0.5.0-pre.4` (#413) #3

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	3m 19s
build (1.65.0, wasm32-unknown-unknown)	3m 22s
test (1.65.0)	3m 25s
test (stable)	11s
build (stable, thumbv7em-none-eabi)	22s
build (stable, wasm32-unknown-unknown)	9s
minimal-versions	0s
	10m 48s

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