kem v0.3.0-rc.0 (#2225) #2706

Job	Run time
build (1.85.0, thumbv7em-none-eabi)	21s
test (1.85.0)	18s
build (stable, wasm32-unknown-unknown)	21s
test (stable)	20s
build (stable, thumbv7em-none-eabi)	19s
build (1.85.0, wasm32-unknown-unknown)	16s
	1m 55s

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