Pull back MSRV on Windows #885

Job	Run time
Rustfmt	14s
iOS (aarch64-apple-ios, iphoneos)	54s
Test (ubuntu-20.04, stable)	1m 57s
Docker (aarch64-unknown-linux-gnu)	53s
iOS (x86_64-apple-ios, iphonesimulator)	22s
Test (ubuntu-20.04, beta)	1m 58s
Docker (arm-unknown-linux-gnueabihf)	49s
Windows AArch64	58s
Test (ubuntu-20.04, nightly)	2m 22s
Docker (armv7-unknown-linux-gnueabihf)	55s
Test (macos-latest, stable)	2m 30s
Docker (i586-unknown-linux-gnu)	42s
Build Targets (wasm32-unknown-unknown)	20s
Test (macos-latest, nightly)	5m 11s
Docker (i686-unknown-linux-gnu)	37s
Miri	2m 19s
Build Targets (wasm32-wasi)	19s
Test (windows-latest, 1.76.0-x86_64-msvc)	2m 0s
Docker (powerpc64-unknown-linux-gnu)	1m 15s
Build Targets (x86_64-unknown-fuchsia)	18s
Test (windows-latest, 1.76.0-i686-msvc)	45s
Docker (s390x-unknown-linux-gnu)	50s
Build Targets (x86_64-fortanix-unknown-sgx)	15s
Test (windows-latest, 1.76.0-x86_64-gnu)	2m 54s
Docker (x86_64-pc-windows-gnu)	54s
MSRV (ubuntu-20.04)	49s
Build Targets (x86_64-unknown-illumos)	17s
Docker (x86_64-unknown-linux-gnu)	48s
MSRV (windows-latest)	1m 7s
Docker (x86_64-unknown-linux-musl)	40s
Docker (arm-linux-androideabi)	1m 34s
Docker (armv7-linux-androideabi)	1m 18s
Docker (aarch64-linux-android)	1m 26s
Docker (i686-linux-android)	1m 44s
Docker (x86_64-linux-android)	1m 23s
	43m 37s

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