fix：修复datepicker组件部分手机样式不兼容问题

src/packages/picker/picker.scss

@@ -71,6 +71,7 @@
         white-space: nowrap;
         overflow: hidden;
         text-overflow: ellipsis;
+        height: 36px;
         line-height: 36px;
         color: $title-color;
         font-size: $font-size-base;