Merge pull request #196 from mtelvers/pin-on-windows #732

Job	Run time
build (ubuntu-latest, 4.14.x)	25m 21s
docker (ubuntu-latest, 4.14.x)	11m 40s
build (ubuntu-latest, 5)	24m 38s
build_rsync (ubuntu-latest, 4.14.x, rsync_hardlink)	19m 27s
docker (ubuntu-latest, 5)	11m 38s
build_rsync (ubuntu-latest, 4.14.x, rsync_copy)	18m 11s
build_rsync (ubuntu-latest, 5, rsync_hardlink)	22m 44s
build_rsync (ubuntu-latest, 5, rsync_copy)	21m 18s
	2h 34m 57s

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