OSError not extending Exception in universal_io

[Mark-Toten]

Hi!

I encountered an issue when using this package as a replacement for dart:io for web. The class OSError does not extend Exception in universal_io, while in dart:io it does extend Exception. Since message is already a property, it seems it's just a matter of replacing line 55 in lib/src/io/exceptions.dart:

class OSError {
with
class OSError implements Exception {

OSError already has a message property, so, this is basically it. But maybe I'm missing something here?

Best regards,

Mark