将FlowTrigger触发器整合成接口的形式方便替换

NodeFlow/Model/SingleActionNode.cs

@@ -14,7 +14,14 @@ namespace Serein.NodeFlow.Model
             
         }
 
+        /// <summary>
+        /// 执行方法
+        /// </summary>
+        /// <param name="context"></param>
+        /// <returns></returns>
+        public override Task<object> ExecutingAsync(IDynamicContext context)
+        {
+            return base.ExecutingAsync(context);
+        }
     }
-
-
 }