add logging.addLevelName to add level mapping to logging, this way lo…

[yechielb2000]

…gging will found my custom level name

closes this issue

[yechielb2000]

Now, logging when the StandardSink creating the log record returns the actual level name:

import logging

from loguru import logger

logger.remove()

standard_formatter = logging.Formatter("%(levelname)s | %(levelno)d | %(message)s")
standard_handler = logging.StreamHandler()
standard_handler.setFormatter(standard_formatter)
logger.add(standard_handler, format="{message}")

logger.success("This is a success message")
# => SUCCESS | 25 | This is a success message

[Delgan]

Looking good! Nice catch and thanks for the PR. 👍