Make tick method protected

Signed-off-by: redvinaa <[email protected]>

Author: redvinaa

include/behaviortree_cpp/controls/sequence_node.h

@@ -43,11 +43,11 @@ class SequenceNode : public ControlNode
 protected:
   size_t current_child_idx_;
 
+  virtual BT::NodeStatus tick() override;
+
 private:
   size_t skipped_count_ = 0;
   bool asynch_ = false;
-
-  virtual BT::NodeStatus tick() override;
 };
 
 }  // namespace BT