do not publish cc-test crate #985

Job	Run time
Test (stable)	22s
Test aarch64-apple-tvos	2m 39s
Test CUDA support	41s
Test (beta)	27s
Clippy	6s
Test (nightly)	34s
MSRV (ubuntu-latest)	21s
Rustfmt	9s
Test (linux32)	34s
MSRV (windows-latest)	41s
Test (macos)	44s
Test (aarch64-ios)	1m 18s
Test (win32)	1m 8s
Test (win64)	2m 20s
Test (mingw32)	1m 15s
Test (mingw64)	1m 27s
Test (windows-2019)	1m 6s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	2m 22s
	18m 14s

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