fix: strict version range to 2.6.x

[Meglody]

such like:

<script setup lang="ts">
const count = ref(0)
</script>
<template>
  <span>{{ count }}</span>
</template>

console will throw error:

 The setup binding property "count" is already declared.

and this will appears to dom: { "value": 0 }

[antfu]

Do you mean it conflicts with 2.7?

[Meglody]

Do you mean it conflicts with 2.7?

Yes, Exactly.