Release v1.0.0-alpha.2

Overview of this new release:

• Use computed classes to replace the dependency of classnames

  const rootClasses = computed(() => ({
    'at-xxx': true,
    [`xxx-${props.xxx}`]: Boolean(props.xxx)
  }))

• Use class and style to replace the props of className and customStyle

  // before
  <at-card className="custom-class" customStyle="height: 20px;">...</at-card>
  
  // NOW
  <at-card class="custom-class" style="height: 20px;">...</at-card>

  The props class and style will be merged to the attrs of the component's root node:

  setup(props, { slots, attrs }) {
    h(View, mergeProps(attrs, {
       class: rootClasses.value
    }), slots.default())
  }

• and some other minor fixes