fix：处理内存泄漏问题

libserial/serial.cpp

@@ -20,7 +20,12 @@ public:
         error_ = new char[1024];
         std::memset(error_, 0x0, 1024);
     }
-    ~CSerialOprImp() { delete[] error_; }
+    ~CSerialOprImp()
+    {
+        close();
+        delete port_;
+        delete[] error_;
+    }
 
 public:
     void set_port(const char* port)
@@ -58,7 +63,7 @@ public:
         boost::system::error_code write_ec;
 
         std::size_t ret = boost::asio::write(*port_, boost::asio::buffer(data, len), write_ec);
-        int send_size = static_cast<int>(ret);
+        int         send_size = static_cast<int>(ret);
         return send_size;
     }