Tests

fix: incorrect upper bound for `s` in `sign` #944

Job	Run time
no-std build	2m 31s
no-std build	2m 31s
Unix tests (ubuntu-latest, stable)	14m 34s
Unix tests (ubuntu-latest, stable)	14m 34s
Windows tests (stable, x86_64-pc-windows-gnu)	13m 32s
Windows tests (stable, x86_64-pc-windows-gnu)	13m 32s
Unix tests (ubuntu-latest, nightly)	3m 39s
Unix tests (ubuntu-latest, nightly)	3m 39s
Windows tests (stable, x86_64-pc-windows-msvc)	18m 59s
Windows tests (stable, x86_64-pc-windows-msvc)	18m 59s
Unix tests (macos-11, stable)	9m 29s
Unix tests (macos-11, stable)	9m 29s
Windows tests (nightly, x86_64-pc-windows-gnu)	10m 42s
Windows tests (nightly, x86_64-pc-windows-gnu)	10m 42s
Unix tests (macos-11, nightly)	15m 49s
Unix tests (macos-11, nightly)	3m 55s
Windows tests (nightly, x86_64-pc-windows-msvc)	18m 1s
Windows tests (nightly, x86_64-pc-windows-msvc)	18m 1s
WASM tests	7m 0s
WASM tests	7m 0s
	3h 36m 38s

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