OLEDDisplay.h should have a virtual destructor #143
Description
To allow for more dynamic usage of the library and allow to switch between types, one would create a pointer to the base class (OLEDDisplay) and create a new instance of the object (e.g. SSD1306Wire).
When the object is deleted, only the base class will be deleted unless the destructor is declared virtual.
So a quick fix would be to add the following line to OLEDDisplay.h:
virtual ~OLEDDisplay() {}