crypto-common: release v0.2.0-rc.2 #2364

Job	Run time
build (1.85.0, thumbv7em-none-eabi)	22s
minimal-versions	50s
test (1.85.0)	20s
build (1.85.0, wasm32-unknown-unknown)	19s
test (stable)	20s
build (stable, thumbv7em-none-eabi)	19s
build (stable, wasm32-unknown-unknown)	21s
	2m 51s

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