Tests

sync: libR-sys #146

Job	Run time
ubuntu-latest w/ bindgen (R-devel rust-stable )	2m 21s
windows-latest (R-release rust-stable-msvc)	15m 24s
macOS-latest w/ bindgen (R-devel rust-stable )	7m 22s
windows-latest (R-devel rust-stable-msvc)	14m 58s
windows-latest w/ bindgen (R-release rust-stable-msvc x86_64-pc-windows-gnu)	8m 35s
windows-latest w/ bindgen (R-devel rust-stable-msvc x86_64-pc-windows-gnu)	4m 55s
windows-latest (R-oldrel rust-stable-msvc)	19m 7s
macOS-latest (R-release rust-stable)	14m 33s
windows-latest w/ bindgen (R-release rust-nightly-msvc x86_64-pc-windows-gnu)	7m 47s
windows-latest w/ bindgen (R-oldrel rust-nightly-msvc x86_64-pc-windows-gnu)	8m 1s
ubuntu-latest (R-release rust-stable)	6m 22s
ubuntu-latest (R-release rust-nightly)	6m 10s
ubuntu-latest (R-devel rust-stable)	5m 44s
ubuntu-latest (R-oldrel rust-stable)	6m 13s
	2h 7m 32s

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