Tests

gitignore: macOS #101

Job	Run time
ubuntu-latest w/ bindgen (R-devel rust-stable )	1m 48s
windows-latest (R-release rust-stable-msvc)	8m 55s
macOS-latest w/ bindgen (R-devel rust-stable )	3m 7s
windows-latest (R-devel rust-stable-msvc)	10m 20s
windows-latest w/ bindgen (R-release rust-stable-msvc x86_64-pc-windows-gnu)	5m 8s
windows-latest (R-oldrel rust-stable-msvc)	9m 49s
windows-latest w/ bindgen (R-devel rust-stable-msvc x86_64-pc-windows-gnu)	4m 32s
macOS-latest (R-release rust-stable)	12m 9s
windows-latest w/ bindgen (R-release rust-nightly-msvc x86_64-pc-windows-gnu)	4m 8s
ubuntu-latest (R-release rust-stable)	1m 13s
windows-latest w/ bindgen (R-oldrel rust-nightly-msvc x86_64-pc-windows-gnu)	9m 21s
ubuntu-latest (R-release rust-nightly)	7m 15s
ubuntu-latest (R-devel rust-stable)	17m 35s
ubuntu-latest (R-oldrel rust-stable)	1m 26s
	1h 36m 46s

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