LOO cores for win CI #174

Job	Run time
R CMD CHECK - macOS-latest (devel)	39m 7s
R CMD CHECK - macOS-latest (release)	39m 52s
R CMD CHECK - macOS-latest (oldrel)	39m 40s
R CMD CHECK - windows-latest (devel)	1h 29m 34s
R CMD CHECK - windows-latest (release)	1h 33m 30s
R CMD CHECK - windows-latest (oldrel)	1h 41m 10s
R CMD CHECK - ubuntu-latest (devel)	1h 45m 43s
R CMD CHECK - ubuntu-latest (release)	1h 43m 30s
R CMD CHECK - ubuntu-latest (oldrel)	1h 43m 49s
	11h 55m 55s

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