add SeedExt #42

Job	Run time
miri (bach)	2m 19s
rustfmt	26s
clippy (stable)	1m 8s
env	3s
clippy (beta)	1m 6s
udeps	2m 14s
test (stable, ubuntu-latest)	1s
test (stable, macOS-latest)	1s
test (stable, windows-latest)	1s
test (beta, ubuntu-latest)	1s
test (beta, macOS-latest)	1s
test (beta, windows-latest)	1s
test (nightly-2022-04-12, ubuntu-latest)	1s
test (nightly-2022-04-12, macOS-latest)	1s
test (nightly-2022-04-12, windows-latest)	1s
test ([toolchain], ubuntu-latest)	3s
test ([toolchain], macOS-latest)	1s
test ([toolchain], windows-latest)	1s
test (channel, ubuntu-latest)	1s
test (channel, macOS-latest)	1s
test (channel, windows-latest)	1s
test (=, ubuntu-latest)	1s
test (=, macOS-latest)	7s
test (=, windows-latest)	1s
test ("1.74.1", ubuntu-latest)	10s
test ("1.74.1", macOS-latest)	6s
test ("1.74.1", windows-latest)	1s
test (components, ubuntu-latest)	1s
test (components, macOS-latest)	1s
test (components, windows-latest)	1s
test (=, ubuntu-latest)	1s
test (=, macOS-latest)	7s
test (=, windows-latest)	1s
test ([, ubuntu-latest)	1s
test ([, macOS-latest)	1s
test ([, windows-latest)	1s
test ("rustc",, ubuntu-latest)	3s
test ("rustc",, macOS-latest)	5s
test ("rustc",, windows-latest)	1s
test ("clippy",, ubuntu-latest)	4s
test ("clippy",, macOS-latest)	6s
test ("clippy",, windows-latest)	3s
test ("rustfmt", ubuntu-latest)	2s
test ("rustfmt", macOS-latest)	1s
test ("rustfmt", windows-latest)	1s
test (], ubuntu-latest)	1s
test (], macOS-latest)	1s
test (], windows-latest)	1s
	8m 43s

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