Use virtual destructor in polymorphic base classes

In order to be able to use classes such as `isobus::CANHardwarePlugin`
polymophically C++ requires a `virtual` destructor in the base class.
This ensures that, when the pointer to base is destroyed, that it will
correctly call the derived destructors as well.

hardware_integration/include/isobus/hardware_integration/can_hardware_plugin.hpp

@@ -21,6 +21,8 @@ namespace isobus
 	class CANHardwarePlugin
 	{
 	public:
+		virtual ~CANHardwarePlugin() = default;
+
 		/// @brief Returns if the driver is ready and in a good state
 		/// @details This should return `false` until `open` is called, and after `close` is called, or
 		/// if anything happens that causes the driver to be invalid, like the hardware is disconnected.