The original library fails to change baud rate once a connection is open and provides no way of setting the baud rate before opening a connection. This fork merely changes default baud rates for some devices.
(To use your own baud rate see the feature/initial_baud_rate branch.)
CDC devices Default is newly 230400,8,1,None,flow off
(applies to geniune Arduino Uno; the original baud rate was 115200)
CH34x devices Default is newly 115200,8,1,None,flow off
(applies to Arduino Uno clones; the original baud rate was 9600)