block-buffer: bump `crypto-common` to v0.2.0-pre.5 (#1050) #1610

Job	Run time
build (1.41.0, thumbv7em-none-eabi)	9s
build (1.41.0, wasm32-unknown-unknown)	16s
build (stable, thumbv7em-none-eabi)	5s
test (1.41.0)	14s
build (stable, wasm32-unknown-unknown)	10s
test (stable)	10s
minimal-versions / minimal-versions	21s
	1m 25s

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