Tests

sync: libR-sys #145

Job	Run time
windows-latest (R-release rust-stable-msvc)	15m 50s
windows-latest (R-devel rust-stable-msvc)	14m 26s
ubuntu-latest w/ bindgen (R-devel rust-stable )	1m 59s
windows-latest (R-oldrel rust-stable-msvc)	16m 9s
macOS-latest w/ bindgen (R-devel rust-stable )	7m 59s
macOS-latest (R-release rust-stable)	8m 15s
windows-latest w/ bindgen (R-release rust-stable-msvc x86_64-pc-windows-gnu)	8m 39s
ubuntu-latest (R-release rust-stable)	5m 51s
windows-latest w/ bindgen (R-devel rust-stable-msvc x86_64-pc-windows-gnu)	4m 46s
ubuntu-latest (R-release rust-nightly)	6m 24s
windows-latest w/ bindgen (R-release rust-nightly-msvc x86_64-pc-windows-gnu)	8m 11s
ubuntu-latest (R-devel rust-stable)	7m 24s
windows-latest w/ bindgen (R-oldrel rust-nightly-msvc x86_64-pc-windows-gnu)	9m 59s
ubuntu-latest (R-oldrel rust-stable)	6m 31s
	2h 2m 23s

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