prop_intersectVersionRanges :: VersionRange -> VersionRange -> Version -> Bool
prop_intersectVersionRanges vr1 vr2 v' =
     withinRange v' (intersectVersionRanges vr1 vr2)
  == (withinRange v' vr1 && withinRange v' vr2)
prop_intersectVersionRanges :: VersionRange -> VersionRange -> Version -> Bool
prop_intersectVersionRanges vr1 vr2 v' =
     withinRange v' (intersectVersionRanges vr1 vr2)
  == (withinRange v' vr1 && withinRange v' vr2)
prop_intersectVersionRanges vr1 vr2 v' =
     withinRange v' (intersectVersionRanges vr1 vr2)
  == (withinRange v' vr1 && withinRange v' vr2)