fix date

lib/formatDate.js

@@ -9,9 +9,10 @@ export default function formatDate (date, local) {
   const d = new Date(date)
   const options = { year: 'numeric', month: 'short', day: 'numeric' }
   const res = d.toLocaleDateString(local, options)
-  return res
+  return local.slice(0, 2).toLowerCase() === 'zh'
+    ? res.replace('年', '-').replace('月', '-').replace('日', '')
+    : res
 }
-
 export function formatDateFmt (timestamp, fmt) {
   const date = new Date(timestamp)
   const o = {