add test env command #16

Job	Run time
MSRV (ubuntu-latest)	21s
Test CUDA support	45s
Test build-std (aarch64-tvos)	3m 21s
MSRV (windows-latest)	33s
Clippy	11s
Test build-std (aarch64-tvos-sim)	2m 30s
Rustfmt	15s
Test build-std (x86_64-tvos)	3m 41s
Test (stable)	24s
Test (beta)	46s
Test (nightly)	37s
Test (linux32)	1m 12s
Test (macos)	3m 17s
Test (aarch64-macos)	45s
Test (aarch64-ios)	1m 18s
Test (win32)	1m 13s
Test (win64)	2m 26s
Test (mingw32)	1m 25s
Test (mingw64)	1m 31s
Test (windows-2019)	2m 27s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	1m 30s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, AR=llvm-ar CC=clang CXX=clang+...	2m 13s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, AR=llvm-ar CC=clang-cl CXX=...	2m 8s
	34m 49s

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