Unit tests

Try updating R actions to fix Win CI failures #1862

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Run time

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Job	Run time
macOS-latest (devel)	26m 10s
macOS-latest (release)	26m 1s
windows-latest (devel)	1h 37m 56s
windows-latest (release)	1h 32m 23s
windows-latest (oldrel)	1h 40m 23s
ubuntu-latest (devel)	1h 1m 36s
ubuntu-latest (release)	58m 18s
ubuntu-latest (oldrel)	58m 37s
	8h 41m 24s