fix[litemall-admin]: 优惠券的datatime格式自定义

litemall-admin/src/views/promotion/coupon.vue

@@ -119,11 +119,11 @@
         </el-form-item>
         <el-form-item v-show="dataForm.timeType === 1">
           <el-col :span="11">
-            <el-date-picker v-model="dataForm.startTime" type="datetime" placeholder="选择日期" style="width: 100%;"/>
+            <el-date-picker v-model="dataForm.startTime" type="datetime" placeholder="选择日期" value-format="yyyy-MM-dd HH:mm:ss" style="width: 100%;"/>
           </el-col>
           <el-col :span="2" class="line">至</el-col>
           <el-col :span="11">
-            <el-date-picker v-model="dataForm.endTime" type="datetime" placeholder="选择日期" style="width: 100%;"/>
+            <el-date-picker v-model="dataForm.endTime" type="datetime" placeholder="选择日期" value-format="yyyy-MM-dd HH:mm:ss" style="width: 100%;"/>
           </el-col>
         </el-form-item>
         <el-form-item label="商品限制范围">