修复开发票的bug，当该发票只有一个订单时，无法计算出最大订单时间与最小订单时间

xhpc-modules/xhpc-invoice/src/main/resources/mapper/XhpcInvoiceMapHistoryOrderMapper.xml

@@ -179,7 +179,7 @@
         FROM `xhpc_invoice_map_history_order`
         WHERE invoice_id = #{invoiceId}
           AND del_flag IS NULL
-        UNION
+        UNION ALL
         SELECT Max(create_time)
         FROM `xhpc_invoice_map_history_order`
         WHERE invoice_id = #{invoiceId}