feat(采购订单): 来源类型增加售后服务选项

src/views/purchasingManage/purchaseOrder/components/addDialog.vue

@@ -53,6 +53,7 @@
               <el-option :value="2" label="采购计划单"></el-option>
               <el-option :value="3" label="采购核价单"></el-option>
               <el-option :value="4" label="采购合同"></el-option>
+              <el-option :value="5" label="售后服务"></el-option>
             </el-select>
           </el-form-item>
           <el-form-item