BREAKING CHANGES

• Renamed props in RecycleScroller and DynamicScroller:

itemHeight => itemSize
minItemHeight => minItemSize
heightField => sizeField

• Renamed slots in RecycleScroller and DynamicScroller:

before-container => before
after-container => after

• Slot variables changed in DynamicScroller:

itemWithHeight => itemWithSize

New

• direction prop (either 'vertical' or 'horizontal')

Fixed

• Do not forward keyField prop from DynamicScroller - closes #132 (#133)