stat 插槽 提示错误

[Lruihao]

v-code-diff 版本：1.13.1

使用局部注册组件：

<CodeDiff old-string="12345" new-string="3456" output-format="side-by-side">
  <template #stat="{ stat }">
    <span class="diff-stat-added">+{{ stat.additionsNum }} 增</span>
    <span class="diff-stat-deleted">-{{ stat.deletionsNum }} 减</span>
    <span v-if="stat.ignoreAdditionsNum + stat.ignoreDeletionsNum > 0" class="diff-stat-ignored">
      ±{{ stat.ignoreAdditionsNum + stat.ignoreDeletionsNum }} 忽略
    </span>
  </template>
</CodeDiff>