MAINT Revert to use numpy.round instead of DataFrame.round to keep pandas backwards compatibility.
MAINT Revert to use numpy.round instead of DataFrame.round to keep pandas backwards compatibility.

chayapan/pyfolio,femtotrader/pyfolio,femtotrader/pyfolio,quantopian/pyfolio,ChinaQuants/pyfolio,quantopian/pyfolio,ChinaQuants/pyfolio