Logger modifies root logger

[TheGreatAlgo]

colourmap/colourmap/colourmap.py

Line 16 in 82c7600

logger = logging.getLogger('')

This accesses the root logger and modifies it so when I import distfit which imports this, my logs become corrupted with the format defined here.

Issue similar to this erdogant/clustimage#22

fixed by #1

[erdogant]

Thank you for your contribution! I created a new version.
Update to the latest version with pip install -U colourmap