message: fix: avoid breaking avoriaz edge case
diff: @@ -32,7 +32,9 @@ export function normalizeScopedSlots (
  res[key] = proxyNormalSlot(normalSlots, key)
  }
  }
  - if (slots) {
  + // avoriaz seems to mock a non-extensible $scopedSlots object
  + // and when that is passed down this would cause an error
  + if (Object.isExtensible(slots)) {
  (slots: any)._normalized = res
  }
  def(res, '$stable', slots ? !!slots.$stable : true)
  