fix: Log to stderr on non-android

[zachariaszeiler]

Since program output is generally printed to stdout, logs and other debug information are generally expected on stderr.

[flxo]

Hello @zachariaszeiler

Ah ok. Wasn't aware of that. Just check the kind of reference env_logger which logs to stderr by default. Can we add the log target selection like this?

cheers,

@flxo