sha1

sha2: provide support for `spki::AlgorithmIdentifier` #1051

Job	Run time
cross (1.72.0, aarch64-unknown-linux-gnu, default)	43s
cross (1.72.0, powerpc-unknown-linux-gnu, default)	48s
cross (stable, aarch64-unknown-linux-gnu, default)	35s
cross (stable, powerpc-unknown-linux-gnu, default)	44s
minimal-versions / minimal-versions	40s
set-msrv / set-msrv	5s
linux (x86_64-unknown-linux-gnu, 1.72.0)	37s
linux (x86_64-unknown-linux-gnu, stable)	35s
macos (1.72.0)	31s
windows (x86_64-pc-windows-gnu, 1.72.0)	55s
macos (stable)	22s
build (1.72.0, thumbv7em-none-eabi)	32s
windows (x86_64-pc-windows-gnu, stable)	1m 30s
build (1.72.0, wasm32-unknown-unknown)	25s
build (1.72.0, loongarch64-unknown-linux-gnu)	26s
build (stable, thumbv7em-none-eabi)	13s
build (stable, wasm32-unknown-unknown)	46s
build (stable, loongarch64-unknown-linux-gnu)	21s
	10m 48s

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