Follow previous commit to (a) conclusion: #653

Job	Run time
Format	12s
Clippy	13s
Build + test (stable, ubuntu-latest)	1m 57s
Smoke-test fuzzing targets	1m 45s
Build + test (beta, ubuntu-latest)	28s
msrv (ubuntu-latest)	44s
Build + test (nightly, ubuntu-latest)	1m 4s
Check semver compatibility	10s
msrv (macos-latest)	50s
Check side-channels on base64 decoder	1m 34s
Build + test (macos-latest, stable)	13s
msrv (windows-latest)	1m 28s
Build + test (windows-latest, stable)	33s
Build wasm32	14s
	11m 25s

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