fix keydown event not bubble

packages/autocomplete/src/autocomplete.vue

@@ -17,7 +17,7 @@
       @blur="handleBlur"
       @keydown.up.native.prevent="highlight(highlightedIndex - 1)"
       @keydown.down.native.prevent="highlight(highlightedIndex + 1)"
-      @keydown.enter.stop.native="handleKeyEnter"
+      @keydown.enter.native.prevent="handleKeyEnter"
     >
       <template slot="prepend" v-if="$slots.prepend">
         <slot name="prepend"></slot>