STM32SD library: File does not inherit from Stream

[pschatzmann]

I noticed that for the File class in your STM32SD library you have all the methods available, but you do not inherit from Arduino Stream.
All other SD libraries I know of (e.g. SD) do this and unfortunately this prevent me from using your library.

Is there any reason for this and would you accept a pull request to have this implemented ?

[fpistm]

Hi @pschatzmann
All contributions are welcome.

[fpistm]

stm32duino/STM32SD#72