build

Derive `Arbitrary` for `multihash_codetable::Code` #1041

Job	Run time
Cargo Deny	7s
Build no_std	12s
Build no_std with `serde` feature enabled	14s
Build (ubuntu-latest, stable)	1m 8s
Cargo Hack - codetable	23s
Build (macos-latest, stable)	56s
Code Coverage	1m 48s
MSRV	13s
Build (windows-latest, stable)	2m 18s
semver-checks	25s
	7m 44s

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