Update MSRV from 1.36 to 1.47 #278

Job	Run time
msrv (aarch64)	58s
check x86	36s
Test with Miri	1m 37s
msrv (x64)	42s
SIMD +sse4.2 on stable	28s
SIMD +sse4.2 on stable	31s
Test stable on ubuntu-latest	33s
SIMD +avx2 on stable	32s
Test stable on windows-latest	1m 8s
SIMD +avx2 on stable	29s
Test stable on macOS-latest	41s
SIMD +sse4.2,+avx2 on stable	28s
Test aarch64 (neon)	50s
Test beta on ubuntu-latest	29s
Test beta on windows-latest	1m 26s
Test beta on macOS-latest	45s
SIMD +sse4.2,+avx2 on stable	30s
clippy_check	16s
Test nightly on ubuntu-latest	48s
SIMD +sse4.2 on beta	31s
Test nightly on windows-latest	2m 8s
SIMD +sse4.2 on beta	28s
Test nightly on macOS-latest	36s
SIMD +avx2 on beta	29s
SIMD +avx2 on beta	29s
SIMD +sse4.2,+avx2 on beta	27s
SIMD +sse4.2,+avx2 on beta	30s
SIMD +sse4.2 on nightly	27s
SIMD +sse4.2 on nightly	28s
SIMD +avx2 on nightly	28s
SIMD +avx2 on nightly	30s
SIMD +sse4.2,+avx2 on nightly	27s
SIMD +sse4.2,+avx2 on nightly	26s
CI is green	1s
	22m 12s

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