chore: bump version to 0.3.1

chore: bump version to 0.3.0

chore: bump to version 0.2.0 (scikit-hep#9)

fix: corrected version and URL

fix: dist upload (scikit-hep#1)

fix: support more types of objects, fallback

Added histograms. Added a general fallback for unknown objects. Nicer icons.

feat: first version, implemented tree command