fix: fix collapse header title not rendering (#256)

John Niang

2021-02-07 c81d48e734b09217fa42df2358e616a970006eab

fix: fix collapse header title not rendering (#256)

 src/components/Container/src/collapse/CollapseHeader.vue

@@ -1,7 +1,7 @@
<template>
  <div :class="`${prefixCls}__header`">
    <BasicTitle :helpMessage="helpMessage">
      <template v-if="$attrs.title">
      <template v-if="title">
        {{ title }}
      </template>
      <template v-else>