Select: update input height in multiple mode

packages/select/src/select.vue

@@ -522,7 +522,7 @@
           if (!this.$refs.reference) return;
           let inputChildNodes = this.$refs.reference.$el.childNodes;
           let input = [].filter.call(inputChildNodes, item => item.tagName === 'INPUT')[0];
-          input.style.height = Math.max(this.$refs.tags.clientHeight + 6, sizeMap[this.size] || 40) + 'px';
+          input.style.height = Math.max(this.$refs.tags.clientHeight + 10, sizeMap[this.size] || 40) + 'px';
           if (this.visible && this.emptyText !== false) {
             this.broadcast('ElSelectDropdown', 'updatePopper');
           }