v2.2.5

Fix nextTick tigger before really render

v2.2.4

• Add key for rendering items #220
• Support prop itemScopedSlots #219

v2.2.3

Props dataKey not allow to number.

v2.2.2

Fix props type warning #211

v2.2.1

Fix estimateSize will be used as a fallback #207

v2.2.0

• Fixed page mode bugs #204 #205

• Support updatePageModeFront public method

v2.1.9

Fix average size calc error #202

v2.1.8

Delete size map when items reducing

v2.1.7

Support page mode #199

v2.1.6

Support style for item, wrapper, header and footer.