do not publish cc-test crate (#926) #986

Job	Run time
Test CUDA support	20s
MSRV (ubuntu-latest)	21s
MSRV (windows-latest)	43s
Test aarch64-apple-tvos	2m 9s
Clippy	18s
Rustfmt	7s
Test (stable)	20s
Test (beta)	32s
Test (nightly)	35s
Test (linux32)	54s
Test (macos)	1m 26s
Test (aarch64-ios)	1m 7s
Test (win32)	1m 23s
Test (win64)	2m 18s
Test (mingw32)	1m 22s
Test (mingw64)	1m 32s
Test (windows-2019)	2m 11s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	1m 43s
	19m 21s

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