v2.0.0

Breaking Changes:

• Support header slot, footer slot, horizontal direction.

• Code structure is more reasonable and good maintainability.

• Abandoned v-for mode and variable mode, all condition unify into one mode.

• Don't have to care about each item size, in sometimes it's difficult to know that.

Attentions:

Since the v2.0 is not compatible with v1.x, please note before upgrading, v1.x documentation see v1.x.md.