Update hermit-abi requirement from 0.3.9 to 0.4.0 #903

Job	Run time
fmt	8s
msrv (ubuntu-latest)	50s
cross (ubuntu-latest, nightly)	2m 29s
clippy	11s
msrv (windows-latest)	59s
cross (ubuntu-latest, stable)	1m 37s
cross (macos-latest, nightly)	1m 5s
security_audit	8s
wine	1m 27s
cross (macos-latest, stable)	54s
test (ubuntu-latest, nightly)	1m 34s
test (ubuntu-latest, beta)	1m 36s
test (ubuntu-latest, stable)	1m 43s
test (windows-latest, nightly)	1m 46s
test (windows-latest, beta)	1m 56s
test (windows-latest, stable)	2m 17s
test (macos-latest, nightly)	1m 9s
test (macos-latest, beta)	1m 9s
test (macos-latest, stable)	1m 6s
test (windows-latest, nightly-x86_64-pc-windows-gnu)	2m 0s
test (windows-latest, nightly-i686-pc-windows-msvc)	2m 4s
test (windows-latest, nightly-i686-pc-windows-gnu)	2m 13s
	30m 21s

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