Adding a list of levels for the Console transport

[tooxie]

This list includes all the levels that should be redirected to stderr instead of stderr.

This is a proper fix for #162 and #163, instead of the terrible decision of hardcoding arbitrary log levels in the code.

[TimBeyer]

👍
The default behavior introduces subtle bugs.
You could maybe default to at least error but in general this is a much better solution.

[tooxie]

@TimBeyer Changed to ['error'] as default.

[indexzero]

Thank you for your contribution, but this will be addressed in another way in [email protected]