Update logging setup

[jobrachem]

Small update to make the liesel default logger behave more like you would expect.

• Increased the level of the "liesel" logger from DEBUG to INFO
• Removed the level INFO from the default handler for the liesel logger.

Now, you can simply update the logging level like this:

import logging

logger = logging.getLogger("liesel")
logger.setLevel(logging.DEBUG)

Before, our setup required that you changed the level on the handler, which is less obvious:

import logging

logger = logging.getLogger("liesel")
logger.handlers[0].setLevel(logging.DEBUG)

[jobrachem]

@GianmarcoCallegher would you do the review?

[GianmarcoCallegher]

Looks good ❤️