Kupyna: implemented hashing function #89

Job	Run time
cross (1.72.0, aarch64-unknown-linux-gnu, default)	39s
cross (1.72.0, powerpc-unknown-linux-gnu, default)	51s
cross (stable, aarch64-unknown-linux-gnu, default)	33s
minimal-versions	0s
cross (stable, powerpc-unknown-linux-gnu, default)	41s
set-msrv / set-msrv	3s
linux (x86_64-unknown-linux-gnu, 1.72.0)	35s
build (1.72.0, thumbv7em-none-eabi)	18s
linux (x86_64-unknown-linux-gnu, stable)	31s
build (1.72.0, wasm32-unknown-unknown)	20s
build (1.72.0, loongarch64-unknown-linux-gnu)	19s
build (stable, thumbv7em-none-eabi)	12s
macos (1.72.0)	28s
build (stable, wasm32-unknown-unknown)	13s
macos (stable)	24s
build (stable, loongarch64-unknown-linux-gnu)	13s
windows (x86_64-pc-windows-gnu, 1.72.0)	58s
windows (x86_64-pc-windows-gnu, stable)	1m 23s
	8m 41s

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