mgm

Add `bytes` feature passthrough (#631) #810

Job	Run time
build (1.56.0, thumbv7em-none-eabi)	52s
build (1.56.0, wasm32-unknown-unknown)	48s
build (stable, thumbv7em-none-eabi)	7s
test (1.56.0)	1m 8s
build (stable, wasm32-unknown-unknown)	14s
test (stable)	16s
	3m 25s

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