Tests

`cargo fmt` #115

Job	Run time
ubuntu-latest w/ bindgen (R-devel rust-stable )	4m 36s
windows-latest (R-release rust-stable-msvc)	8m 34s
macOS-latest w/ bindgen (R-devel rust-stable )	6m 0s
windows-latest (R-devel rust-stable-msvc)	8m 56s
windows-latest w/ bindgen (R-release rust-stable-msvc x86_64-pc-windows-gnu)	5m 51s
windows-latest (R-oldrel rust-stable-msvc)	12m 8s
windows-latest w/ bindgen (R-devel rust-stable-msvc x86_64-pc-windows-gnu)	6m 47s
macOS-latest (R-release rust-stable)	10m 33s
windows-latest w/ bindgen (R-release rust-nightly-msvc x86_64-pc-windows-gnu)	7m 43s
ubuntu-latest (R-release rust-stable)	5m 7s
windows-latest w/ bindgen (R-oldrel rust-nightly-msvc x86_64-pc-windows-gnu)	10m 44s
ubuntu-latest (R-release rust-nightly)	5m 25s
ubuntu-latest (R-devel rust-stable)	16m 59s
ubuntu-latest (R-oldrel rust-stable)	1m 50s
	1h 51m 13s

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