Merge pull request #594 from ideal-5/picker-class

feat: 更新u-picker组件 增加当前选中class类名

src/uni_modules/uview-plus/components/u-picker/u-picker.vue

@@ -48,6 +48,7 @@
 						<view
 							v-if="testArray(item)"
 							class="u-picker__view__column__item u-line-1"
+							:class="[index1 === innerIndex[index] && 'u-picker__view__column__item--selected']"
 							v-for="(item1, index1) in item"
 							:key="index1"
 							:style="{