Transition from wasm32-wasi to wasm32-wasip1, fix clippy lint #1891

Job	Run time
wasm-no-simd128	2m 4s
msrv	1m 59s
build-for-x86-64-but-non-sse-target	1m 55s
miri	8m 54s
rebar	2m 44s
rustfmt	15s
wasm	1m 14s
test (stable, ubuntu-latest, stable)	2m 7s
test (beta, ubuntu-latest, beta)	2m 32s
test (nightly, ubuntu-latest, nightly)	1m 59s
test (macos, macos-latest, stable)	1m 26s
test (win-msvc, windows-latest, stable)	3m 13s
test (win-gnu, windows-latest, stable-x86_64-gnu)	3m 15s
test (stable-x86, ubuntu-latest, stable, i686-unknown-linux-gnu)	2m 29s
test (stable-aarch64, ubuntu-latest, stable, aarch64-unknown-linux-gnu)	2m 5s
test (stable-powerpc64, ubuntu-latest, stable, powerpc64-unknown-linux-gnu)	1m 56s
test (stable-s390x, ubuntu-latest, stable, s390x-unknown-linux-gnu)	2m 19s
	42m 26s

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