v1.8.0

ArrayLayouts v1.8.0

Diff since v1.7.0

Merged pull requests:

• Parent for RangeCumSum returns the wrapped range (#214) (@jishnub)
• Negate RangeCumSum (#215) (@jishnub)
• Sum for RangeCumsum (#216) (@jishnub)
• Avoid overflow in indexing and sum (#217) (@jishnub)
• Show for RangeCumsum (#218) (@jishnub)