新增儿童，幼儿规则

src/main/java/com/diagbot/rule/GroupRule.java

@@ -77,7 +77,7 @@ public class GroupRule {
                     break;
                 case "儿童":
                     if (age != null) {
-                        if (age <= 12.0D && age >= 4.0D) {
+                        if (age <= 15.0D && age > 2.5D) {
                             BillMsg commonBillMsg = MsgUtil.getCommonBillMsg(
                                     billNeoMaxDTO.getOrderName(), billNeoMaxDTO.getOrderStandName(),
                                     "儿童", type, billNeoMaxDTO.getType());